Vitamins & Supplements · Formula
Children's Multivitamins
Children's multivitamin and mineral supplements (product type) · also called Pediatric multivitamins, kids' gummy vitamins, multivitaminas para niños
Children's multivitamins are mixed vitamin and mineral products made for young children and sold as gummies, chewables, drops, liquids and powders. No trial in well-fed children shows they improve health, and one trial in infants found no effect on development. UK advice names three vitamins, A, C and D, for ages 6 months to 5 years. The main cautions are iron poisoning if a child swallows many, products with amounts above upper limits, and labels that do not match lab results. Ask a doctor or pharmacist first.
General information, not medical advice. Last substantive update · Not medically reviewed. A named clinician has not signed off on this page. How this page is made
About Children's Multivitamins
A children's multivitamin is a mix of vitamins and often minerals made for young children. The evidence that routine use helps well-fed children is thin. The clearest risks are iron poisoning, amounts above upper limits and labels that do not match what is inside.
What a children's multivitamin is
A children's multivitamin is one product that combines several vitamins and often minerals for young children. It comes as gummies, chewable tablets, drops, liquids, capsules and powders.
This page is about the product type, not one vitamin. It is sold to parents of toddlers and young school-age children, often with child-friendly packaging. A label survey found that a major share of products carried child-friendly and parent-targeted promotional language on the pack.
What is usually inside
A review of all 288 US products labelled for ages 1 to under 4 found an average of about 10 vitamins and 4 to 5 minerals per product. The most common were vitamins C, A, D, E, B6 and B12, then zinc, biotin, pantothenic acid, iodine and folic acid. Calcium was listed in 144 of the 288 products and potassium in 60.
Each main ingredient has its own page: iron, zinc, vitamin A, vitamin D, vitamin C, folate and iodine are linked under Related, along with the pages on gummies, adult multivitamins and what to do after an overdose. Amounts differ widely, and some products carry minerals such as iron or manganese while others do not. Labels do not always match what is in the product.
Who is it sold to, and who might need one
Children's multivitamins are sold to parents of toddlers and young children, including picky eaters. The sources read do not say a multivitamin is needed for picky eating.
UK advice is for specific vitamins, not a general multivitamin. The NHS says the government recommends all children aged 6 months to 5 years be given vitamin supplements with vitamins A, C and D every day. Babies having more than 500 ml of infant formula a day should not be given them. Breastfed babies should have vitamin D from birth. The NHS says only supplements with A, C and D are recommended, and to talk to a pharmacist about which would suit a child.
US sources read for this page do not give an equivalent routine recommendation; the NIH Office of Dietary Supplements page could not be read. Children with medical conditions, restricted diets or medicines should ask a doctor or pharmacist.
How to read the label
The Supplement Facts panel lists a serving size and the amount of each nutrient per serving. FDA explains that a Daily Value (DV) is a reference amount, and the % Daily Value shows how much one serving of a packaged food or supplement contributes. For example, if the DV is 300 micrograms and a serving has 30, the % DV is 10%.
FDA also says it is not authorised to approve dietary supplements for safety and effectiveness before they are sold, so the label is the main tool a parent has. Look at the serving size, whether iron is listed, and all the added ingredients and colours. Proprietary blends have their own page. The sources read do not compare gummies, chewables, drops and liquids for children.
Upper limits by age (EFSA, EU)
An upper limit is the highest total daily intake from all sources not expected to cause harm. It is not a target. EFSA's version 11 (August 2025) lists these upper levels for ages 1 to 3, 4 to 6, 7 to 10 and 11 to 14: vitamin A (retinol equivalents) 800, 1,100, 1,500 and 2,000 micrograms; folic acid from supplements and fortified foods 200, 300, 400 and 600 micrograms; vitamin D 50, 50, 50 and 100 micrograms; zinc 7, 10, 13 and 18 mg; iodine 200, 250, 300 and 450 micrograms.
EFSA sets no upper level for iron or manganese. For iron it gives a safe level of intake of 10, 15, 20 and 30 mg for the same age bands. In studies, some children's products listed amounts at or above upper limits, and supplement use pushed children over limits for several nutrients; see the Safety tab.
Food versus pills
Food comes first. The NHS says it is important for children to eat a wide variety of foods to get all the energy and nutrients they need to grow and develop. A US survey found that children aged 2 to 8 had adequate diets whether or not they took supplements.
Vitamin D is the exception in UK advice: the NHS says it is found in only a few foods, such as oily fish and eggs, and is hard to get enough of from food alone. Nutrient amounts in foods were not read from USDA or NIH sources, so none are given here.
At a glance
Traditional uses history, not proof
- Sold as everyday insurance for children who eat unevenly
- UK health services recommend vitamins A, C and D for under-fives (three vitamins, not a general multivitamin)
Studied for research
- Nutrient gaps in children's diets, low certainty
- What is inside products, moderate certainty (labels only)
- Child development, insufficient evidence
- Anaemia and iron deficiency with micronutrient powders in poorer countries, moderate certainty
- Growth and illness, low certainty
- Gummy versus tablet absorption, very-low certainty (adults)
- Teeth, insufficient evidence (lab only)
Main compounds
- Vitamins C, A, D, E, B6, B12
- Biotin, pantothenic acid, folic acid
- Zinc, iodine
- Sometimes iron, calcium, manganese
Common forms
- Gummies
- Chewable tablets
- Drops and liquids
- Powders and capsules
Research links: 2022 review: 288 multivitamin products for ages 1 to under 4 · 2026 lab test: manganese in 52 children's products · 2023 label survey: vitamin A and niacin at or above upper limits · 2017 trial: multivitamin and child development in Tanzania · 2020 Cochrane review: micronutrient powders in children under two · NHS: vitamins for children · Research Library · Genes & Biomarkers Library
What it is and its history
- Accepted scientific name
- Children's multivitamin and mineral supplements (a product type)
- Common names
- Children's multivitamins (English); Pediatric multivitamins (English); Gummy vitamins for kids (English); Multivitaminas para niños (Spanish); Vitaminas masticables para niños (Spanish)
- Family or group
- Formula: a mix of several vitamins and often minerals in one product, made for young children.
- Look-alikes and adulterants
- Name: Adult multivitamins; Note: Have their own page; often carry more iron per serving, which matters if a child swallows them.; Name: Prenatal vitamins; Note: Have their own page; MedlinePlus says a severe iron overdose can happen if a child eats them.; Name: Micronutrient powders; Note: Powders sprinkled on food in public-health programmes; studied in the Cochrane reviews on this page, not the same as a gummy or chewable.; Name: Vitamin drops (A, C and D); Note: The product the UK government recommends for children aged 6 months to 5 years.
- Sustainability and conservation
- Not assessed.
What is inside, and how it may work
What it contains and how those compounds act in cells and animals. Laboratory and animal mechanisms are not proven effects in people.
Main compounds
| Compound | Family | Where it is concentrated | Activity studied | Level of evidence |
|---|---|---|---|---|
| Vitamin C | vitamin | Amount not read from a source. | Among the most common ingredients; the NHS says it supports the immune system and helps the body absorb iron. 5 18 | Human data |
| Vitamin A | vitamin | Amount not read from a source. | The NHS says it supports the immune system, vision in dim light and skin; in the label review, 17% of 283 products with it exceeded the upper tolerable intake level. 5 18 | Human data |
| Vitamin D | vitamin | Amount not read from a source. | The NHS says it is found in few foods and is hard to get enough of from food alone; 56% of 281 US products with it gave at least half the Daily Value. 5 18 | Human data |
| Vitamins E, B6 and B12; biotin; pantothenic acid; folic acid | vitamins | Amounts not read from a source. | Listed among the common ingredients in the label review; folic acid exceeded the upper level in 49% of 197 products with it. 5 | Human data |
| Zinc, iodine, iron, calcium, manganese | minerals | Amounts not read from a source. | Zinc and iodine are among the most common minerals; calcium appears in few products; iron and manganese are the main safety and label-accuracy issues. 5 7 16 | Human data |
Mechanisms, receptors and pathways
| Target or pathway | Gene or receptor | What was found | Level |
|---|---|---|---|
| Vitamin C and iron absorption | Not specified in the sources read | The NHS says vitamin C can help the body absorb iron. 18 | Human data |
| Form and absorption | Not specified in the sources read | In adults, blood vitamin D3 was higher after a gummy than a tablet in one single-dose study. Whether this applies to children or to other nutrients was not tested. 12 | Human data |
| Acids in gummy and chewable forms | Not specified in the sources read | The authors of a lab study say citric and ascorbic acid in gummies and chewables can lower pH below 5.5, where erosion of dental materials starts. Lab only. 6 | Lab |
Absorption, metabolism and elimination
- Absorption
- Only one comparison was read: vitamin D3 from a gummy versus a tablet in adults (single dose).
- Distribution
- Not found.
- Metabolism
- Not found.
- Elimination
- Not found.
- Bioavailability
- Not compared across children's multivitamin forms in the sources read.
Isolated compounds versus whole extracts
Food and pills are different. The NHS says it is important for children to eat a wide variety of foods to get all the energy and nutrients they need. In a US survey, children aged 2 to 8 had adequate diets whether or not they took supplements. Vitamin D is the exception: the NHS says it is found in only a few foods and is hard to get enough of from food alone.
Nutritional composition
This page is about a mixed product, so no USDA amounts are given. For vitamin A, the NHS names dairy, fortified fat spreads, carrots, sweet potatoes, swede and mangoes, and dark green vegetables as good sources. For vitamin C it names oranges, kiwi fruit, strawberries, broccoli, tomatoes and peppers. For vitamin D it names oily fish and eggs and says some foods such as fat spreads and breakfast cereals are fortified. Amounts per portion were not read from USDA or NIH sources, so none are stated.
2 moderate certainty2 low certainty1 very low certainty2 not enough evidence
What was looked at
The 7 benefits and uses checked for Children's Multivitamins, each with how strong the evidence is. Tap one to open it.
- Filling nutrient gaps in children's dietsLow certainty
- What is inside children's multivitamin productsModerate certainty
- Thinking, language and movement (child development)Not enough evidence
- Anaemia and iron deficiency (micronutrient powders in low-income settings)Moderate certainty
- Growth and illnessLow certainty
- Gummy versus tablet form (how well the body takes up the vitamins)Very low certainty
- Teeth and tooth fillings (gummy and chewable forms)Not enough evidence
Lab markers tracked in the studies
Intake of vitamins and minerals compared with recommendationsDevelopment scores (Bayley III)Anaemia and iron deficiencyBlood vitamin D3 after a gummy or tablet
What is Children's Multivitamins good for?
The main studied questions and how strong the evidence is for each. No study tested a children's multivitamin gummy or chewable for health results in well-fed children, so most entries come from surveys, label counts, lab tests or a neighbouring product (powders on food).
Benefits, one by one
Each card is a research question, not a promise. Tap a goal to filter. Open a card to see the studies, doses and limits.
Filling nutrient gaps in children's diets
Low certaintySurveys of what US children eat suggest that most children aged 2 to 8 already get enough of most vitamins and minerals from food, with or without supplements. Calcium and vitamin D were low in all age groups. Older children (9 to 18) were more often short of magnesium, phosphorus and vitamins A, C and E. Supplements raised the chance of going over upper limits for several nutrients. No trial tested whether closing a gap with a multivitamin improves health.
2 studiesAll forms of children's multivitamin and mineral products; amounts ar…
Studies, doses and limits
What the trials found
A US national survey of 7,250 children aged 2 to 18 (2003-2006) found supplement use in 21% of under-2s and 42% of ages 2 to 8. Users had higher intakes. Among ages 2 to 8, inadequate intakes were minimal from food alone for phosphorus, copper, selenium, folate and vitamins B6 and B12, and diets were adequate whether or not supplements were used. In ages 9 to 18, supplements added nutrients where diets fell short (magnesium, phosphorus, vitamins A, C, E). Even with supplements, more than a third of children missed calcium and vitamin D recommendations. A 2022 review of the 288 products labelled for ages 1 to under 4 found that 56% of those with vitamin D gave at least half the Daily Value, but only 4% of those with calcium did, and none of those with potassium; most contained many nutrients already plentiful in children's diets. The authors suggest formulas could be re-examined to fill real gaps and avoid excess.
Results
Low-certainty picture: for young children eating a normal diet, food seems to cover most needs. Products often contain nutrients children already get plenty of and are weak on the nutrients that are low (calcium, potassium).
Effect sizes as reported
Supplement use: 21% under 2 years, 42% ages 2 to 8. More than a third missed calcium and vitamin D recommendations even with supplements. Vitamin D at half the Daily Value or more in 56% of 281 products; calcium 4% of 144; potassium 0 of 60.
Why this rating
Low because these are one-time surveys and label counts. They show intakes and contents, not health results, and the survey data are from 2003-2006.
Form and dose studied
All forms of children's multivitamin and mineral products; amounts are described only as label counts or survey results.
Who was studied
US children aged 2 to 18 (survey); products labelled for ages 1 to under 4 (label review).
Limits
Cross-sectional data; self-reported food; label amounts may differ from the product; no trial outcome.
Why researchers looked
Parents and doctors ask whether a daily multivitamin fills gaps for children who eat unevenly.
Traditional use
Children's multivitamins are mixed vitamin and mineral products made for young children. This page is about the product type, not one vitamin.
Proposed mechanism Not established
A product can only fill a gap if it contains the missing nutrient. Surveys show what children eat, not whether a pill changes health.
A proposed mechanism does not show that the effect happens in people.
The same surveys found supplements pushed some children above upper limits (see the Safety tab).
What is inside children's multivitamin products
Moderate certaintyA 2022 review of all 288 US products labelled for ages 1 to under 4 found a typical product lists about 10 vitamins and 4 to 5 minerals. The most common were vitamins C, A, D, E, B6 and B12, then zinc, biotin, pantothenic acid, iodine and folic acid. This describes labels, not what a lab would find.
1 studiesNot applicable.
Studies, doses and limits
What the trials found
The 288 products came from the US NIH Dietary Supplement Label Database in 2018 and contained on average 10.1 vitamins and 4.59 minerals. A separate lab check of 52 products (2026) found that measured manganese often differed from the label (see the Safety tab).
Results
Most children's multivitamins contain a similar core of vitamins plus a few minerals, with wide differences in amounts from product to product.
Effect sizes as reported
Mean 10.1 vitamins and 4.59 minerals per product (288 products).
Why this rating
Moderate that this is what labels list in the US database in 2018. Not rated higher because labels are not lab tests and products change.
Who was studied
Products labelled for ages 1 to under 4 in the US.
Limits
One country and one year; labels only.
Why researchers looked
There is no single recipe for a children's multivitamin, so researchers counted what the labels list.
Traditional use
Children's multivitamins are mixed vitamin and mineral products made for young children. This page is about the product type, not one vitamin.
Proposed mechanism Label database
Not applicable: this is a count of ingredients on labels.
A proposed mechanism does not show that the effect happens in people.
See the Safety tab for upper limits and label accuracy.
Thinking, language and movement (child development)
Not enough evidenceThe one randomised trial found in this search tested a daily B-complex, C and E multivitamin in Tanzanian infants. At about 15 months, development scores were no different from placebo. This does not show harm or benefit for a well-fed child elsewhere.
1 studiesStudied amount is in the studies table.
Studies, doses and limits
What the trials found
In a 2 x 2 double-blind trial, 2,400 infants were randomised at 6 weeks to zinc, multivitamins, both, or placebo. At about 15 months, 247 children were tested with the Bayley Scales. No difference was found in any of five areas (cognitive, receptive and expressive language, fine and gross motor) for any group, or for zinc versus no zinc, or multivitamin versus no multivitamin.
Results
No effect found on development in this one trial.
Effect sizes as reported
No significant difference in mean scores in five areas.
Why this rating
Insufficient: one trial, in infants in Tanzania, with a multivitamin that lacked vitamins A and D and minerals, tested in only 247 of 2,400 children.
Form and dose studied
Studied amount is in the studies table.
Who was studied
Tanzanian infants from 6 weeks to about 15 months.
Limits
Different setting, different formula, small tested sub-sample.
Why researchers looked
Poor early nutrition can affect development, so trials asked whether a multivitamin helps infants in poor settings.
Traditional use
Children's multivitamins are mixed vitamin and mineral products made for young children. This page is about the product type, not one vitamin.
Proposed mechanism Not established
Not established.
A proposed mechanism does not show that the effect happens in people.
Safety was not reported in the abstract.
Anaemia and iron deficiency (micronutrient powders in low-income settings)
Moderate certaintyTwo Cochrane reviews of powders containing iron and other nutrients, sprinkled on children's food, found less anaemia and less iron deficiency than no treatment or placebo. These trials were in countries where anaemia is common and the product was a powder, not a gummy or chewable multivitamin.
2 studiesPowders with 2 to 22 nutrients; iron from 2.5 mg to 30 mg in differen…
Studies, doses and limits
What the trials found
Children aged 6 to 23 months: 29 trials, 33,147 children. Anaemia fell by 18% (moderate certainty) and iron deficiency by 53% (high certainty) versus no treatment or placebo. Children aged 24 months to 12 years: 13 trials, 5,810 children. Anaemia prevalence ratio 0.66 and iron deficiency 0.35 (both moderate quality), with haemoglobin 3.37 g/L higher (low quality).
Results
Clear benefit for iron status in these trials. It applies to iron-containing powders in settings with a lot of anaemia and does not show a benefit of a multivitamin for well-fed children.
Effect sizes as reported
Under 2 years: anaemia RR 0.82 (0.76 to 0.90); iron deficiency RR 0.47 (0.39 to 0.56). Ages 2 to 12: anaemia PR 0.66 (0.49 to 0.88); iron deficiency PR 0.35 (0.27 to 0.47).
Why this rating
Moderate to high in the reviews for iron deficiency and moderate for anaemia, but only for powders that contain iron in places with common anaemia.
Form and dose studied
Powders with 2 to 22 nutrients; iron from 2.5 mg to 30 mg in different trials (studied in the trials).
Who was studied
Children aged 6 months to 12 years in Latin America, Africa and Asia.
Limits
Powder on food, not a chewable or gummy; many trials unblinded; side effects poorly reported; review authors have ties to micronutrient programmes.
Why researchers looked
Anaemia from iron lack is common in young children in poorer countries, so programmes mix multi-nutrient powders into food.
Traditional use
Children's multivitamins are mixed vitamin and mineral products made for young children. This page is about the product type, not one vitamin.
Proposed mechanism Established physiology
Iron in the powder replaces missing iron; other nutrients are added to cover several gaps at once. The reviews measure results, not mechanisms.
A proposed mechanism does not show that the effect happens in people.
Iron is also the main poisoning risk if a child swallows many iron-containing products. See the Safety tab.
Growth and illness
Low certaintyIn the under-two review, multi-nutrient powders did not change weight-for-age. They did not raise diarrhoea, chest infections, malaria or all-cause illness, though few trials reported these. No trial of gummy or chewable multivitamins in well-fed children was found for growth or illness.
2 studiesPowders on food; amounts vary.
Studies, doses and limits
What the trials found
In the 2020 Cochrane review (26 trials with data), weight-for-age showed no effect (mean difference 0.02, 95% CI -0.03 to 0.07; 9,287 children; moderate certainty). Few trials reported illness, and powders did not increase diarrhoea, chest infections, malaria or all-cause illness. In the 2017 review of preschool and school-age children, diarrhoea was not changed (RR 0.97, 2 trials, 366 children; low quality) and one trial reported no deaths. Both reviews say information on illness, development and side effects is scarce.
Results
No effect on weight-for-age; no sign of more illness; evidence thin.
Effect sizes as reported
Weight-for-age MD 0.02 (-0.03 to 0.07). Diarrhoea RR 0.97 (0.53 to 1.78) in preschool and school-age children.
Why this rating
Low overall: the no-effect result on weight is moderate certainty, but illness data come from few trials of powders in poorer settings.
Form and dose studied
Powders on food; amounts vary.
Who was studied
Children aged 6 months to 12 years in low- and middle-income countries.
Limits
Powders are not multivitamin gummies; illness definitions varied; few trials.
Why researchers looked
Better nutrition is expected to help children grow and stay well, so trials measured growth and illness.
Traditional use
Children's multivitamins are mixed vitamin and mineral products made for young children. This page is about the product type, not one vitamin.
Proposed mechanism Not established
Not established.
A proposed mechanism does not show that the effect happens in people.
No extra illness was seen, but side effects were rarely reported.
Gummy versus tablet form (how well the body takes up the vitamins)
Very low certaintyThe only trial found compared vitamin D3 gummies with tablets in healthy adults after a single high amount. Blood vitamin D rose more with the gummy. This is one vitamin, one product pair and adults. It does not show that gummies are better for children.
1 studiesOne amount of vitamin D3, single dose (studied in the trial).
Studies, doses and limits
What the trials found
A crossover study of 9 adults and then 31 adults compared one vitamin D3 gummy with one tablet. The gummy gave a larger area under the blood curve and a higher peak. The authors conclude greater bioavailability for the gummy.
Results
Form can change absorption of a single nutrient. Whether this holds for children or for a multivitamin was not tested.
Effect sizes as reported
Area under curve 1,474 (gummy) versus 774 (tablet) ng.h/mL; peak 47.3 versus 23.4 ng/mL.
Why this rating
Very low for children's multivitamins: one small adult study of one vitamin with a single high amount.
Form and dose studied
One amount of vitamin D3, single dose (studied in the trial).
Who was studied
Healthy adults aged 18 to 45.
Limits
Adults; one vitamin; one-off dose; higher blood level is not a health outcome.
Why researchers looked
Many children's multivitamins are gummies, so researchers asked whether form changes how much of a vitamin is absorbed.
Traditional use
Children's multivitamins are mixed vitamin and mineral products made for young children. This page is about the product type, not one vitamin.
Proposed mechanism Not established
Not established. The authors measured blood levels; they did not test why the forms differ.
A proposed mechanism does not show that the effect happens in people.
Higher absorption could also mean more exposure; no safety outcome was measured.
Teeth and tooth fillings (gummy and chewable forms)
Not enough evidenceA 2026 laboratory study soaked tooth-filling materials in solutions made from a gummy and a chewable tablet. Both made the materials softer and rougher. No children, no teeth and no decay were studied, so this is not a finding about tooth decay.
1 studiesNot applicable.
Studies, doses and limits
What the trials found
No human study was read. In the lab, 135 test pieces of three filling materials were soaked for simulated 6 months; both products reduced hardness and raised roughness. Colour changes stayed within what is clinically acceptable.
Results
Laboratory finding only: acidic gummy and chewable vitamins changed filling materials in a dish.
Effect sizes as reported
Hardness lower and roughness higher with both products versus artificial saliva; the gummy lowered hardness more in two of three materials.
Why this rating
Insufficient: lab only, two products, no teeth or children.
Who was studied
No people.
Limits
Did not test natural teeth, saliva flow, rinsing or decay.
Why researchers looked
Gummy and chewable vitamins contain acids and may be sticky, so researchers asked how they affect the mouth.
Traditional use
Children's multivitamins are mixed vitamin and mineral products made for young children. This page is about the product type, not one vitamin.
Proposed mechanism Laboratory only
The authors say citric and ascorbic acid can lower pH below 5.5, where erosion starts. Shown in the lab only.
A proposed mechanism does not show that the effect happens in people.
No human harm or benefit shown.
Connections to the rest of health
How Children's Multivitamins connects to the rest of our health knowledge graph. Every link says what kind of connection it is. A safety link (for example to the liver) is a warning, not a benefit. A study that merely mentions a topic never creates a benefit link.
Explore every connection: goals, body systems, organs, symptoms, genes
A. Wellness goals
| Connected to | Kind of connection | Evidence status | Context | Studies |
|---|---|---|---|---|
| Balanced Nutrition | Low certainty | Filling nutrient gaps in children's diets: Surveys of what US children eat suggest that most children aged 2 to 8 already get enough of most vitamins and minerals from food, with or without supplements. Calcium and vitamin D were low in all age groups. Older children (9 to 18) were more often short of magnesium, phosphorus and vitamins A, C and E. Supplements raised the chance of going over upper limits for several nutrients. No trial tested whether closing a gap with a multivitamin improves health. | 1 5 | |
| Preventive Wellness | Low certainty | Filling nutrient gaps in children's diets: Surveys of what US children eat suggest that most children aged 2 to 8 already get enough of most vitamins and minerals from food, with or without supplements. Calcium and vitamin D were low in all age groups. Older children (9 to 18) were more often short of magnesium, phosphorus and vitamins A, C and E. Supplements raised the chance of going over upper limits for several nutrients. No trial tested whether closing a gap with a multivitamin improves health. | 1 5 | |
| Balanced Nutrition | Moderate certainty | What is inside children's multivitamin products: A 2022 review of all 288 US products labelled for ages 1 to under 4 found a typical product lists about 10 vitamins and 4 to 5 minerals. The most common were vitamins C, A, D, E, B6 and B12, then zinc, biotin, pantothenic acid, iodine and folic acid. This describes labels, not what a lab would find. | 5 | |
| Preventive Wellness | Not enough evidence | Thinking, language and movement (child development): The one randomised trial found in this search tested a daily B-complex, C and E multivitamin in Tanzanian infants. At about 15 months, development scores were no different from placebo. This does not show harm or benefit for a well-fed child elsewhere. Growth and illness: In the under-two review, multi-nutrient powders did not change weight-for-age. They did not raise diarrhoea, chest infections, malaria or all-cause illness, though few trials reported these. No trial of gummy or chewable multivitamins in well-fed children was found for growth or illness. | 9 11 4 | |
| Brain Health | Not enough evidence | Thinking, language and movement (child development): The one randomised trial found in this search tested a daily B-complex, C and E multivitamin in Tanzanian infants. At about 15 months, development scores were no different from placebo. This does not show harm or benefit for a well-fed child elsewhere. | 9 | |
| Balanced Nutrition | Moderate certainty | Anaemia and iron deficiency (micronutrient powders in low-income settings): Two Cochrane reviews of powders containing iron and other nutrients, sprinkled on children's food, found less anaemia and less iron deficiency than no treatment or placebo. These trials were in countries where anaemia is common and the product was a powder, not a gummy or chewable multivitamin. | 11 4 | |
| Immune Support | Low certainty | Growth and illness: In the under-two review, multi-nutrient powders did not change weight-for-age. They did not raise diarrhoea, chest infections, malaria or all-cause illness, though few trials reported these. No trial of gummy or chewable multivitamins in well-fed children was found for growth or illness. | 11 4 | |
| Balanced Nutrition | Very low certainty | Gummy versus tablet form (how well the body takes up the vitamins): The only trial found compared vitamin D3 gummies with tablets in healthy adults after a single high amount. Blood vitamin D rose more with the gummy. This is one vitamin, one product pair and adults. It does not show that gummies are better for children. | 12 | |
| Balanced Nutrition | Not enough evidence | Teeth and tooth fillings (gummy and chewable forms): A 2026 laboratory study soaked tooth-filling materials in solutions made from a gummy and a chewable tablet. Both made the materials softer and rougher. No children, no teeth and no decay were studied, so this is not a finding about tooth decay. | 6 |
B. Body systems
| Connected to | Kind of connection | Evidence status | Context | Studies |
|---|---|---|---|---|
| Nutrition | Biological association | Low certainty | Studied for: Filling nutrient gaps in children's diets Studied for: What is inside children's multivitamin products | 1 5 12 |
| Nervous System | Biological association | Not enough evidence | Studied for: Thinking, language and movement (child development) | 9 |
| Blood | Biological association | Moderate certainty | Studied for: Anaemia and iron deficiency (micronutrient powders in low-income settings) | 11 4 |
| Immune System | Biological association | Low certainty | Studied for: Growth and illness | 11 4 |
| Whole Body | Biological association | Low certainty | Studied for: Growth and illness | 11 4 |
| Digestive System | Biological association | Not enough evidence | Studied for: Teeth and tooth fillings (gummy and chewable forms) | 6 |
I. Biomarkers
| Connected to | Kind of connection | Evidence status | Context | Studies |
|---|---|---|---|---|
| Intake of vitamins and minerals compared with recommendations | Biological association | Low certainty | Measured in trials: higher with supplements, both toward adequacy and toward excess. A lab change is not the same as a health benefit. | 1 |
| Development scores (Bayley III) | Biological association | Not enough evidence | Measured in trials: no difference. A lab change is not the same as a health benefit. | 9 |
| Anaemia and iron deficiency | Biological association | Moderate certainty | Measured in trials: less anaemia and less iron deficiency. A lab change is not the same as a health benefit. | 11 4 |
| Blood vitamin D3 after a gummy or tablet | Biological association | Very low certainty | Measured in trials: higher after the gummy. A lab change is not the same as a health benefit. | 12 |
K. Biological pathways
| Connected to | Kind of connection | Evidence status | Context | Studies |
|---|---|---|---|---|
| Iron | Preliminary mechanism | Human | The main poisoning risk with multivitamins swallowed in excess; also the nutrient powders were tested on for anaemia. | 16 11 |
| Vitamin D | Preliminary mechanism | Human | Low in children's diets in a US survey and the nutrient most often at half the Daily Value or more in labels. | 1 5 |
L. Active compounds
| Connected to | Kind of connection | Evidence status | Context | Studies |
|---|---|---|---|---|
| Vitamin C | Biological association | Human | Among the most common ingredients; the NHS says it supports the immune system and helps the body absorb iron. | 5 18 |
| Vitamin A | Biological association | Human | The NHS says it supports the immune system, vision in dim light and skin; in the label review, 17% of 283 products with it exceeded the upper tolerable intake level. | 5 18 |
| Vitamin D | Biological association | Human | The NHS says it is found in few foods and is hard to get enough of from food alone; 56% of 281 US products with it gave at least half the Daily Value. | 5 18 |
| Vitamins E, B6 and B12; biotin; pantothenic acid; folic acid | Biological association | Human | Listed among the common ingredients in the label review; folic acid exceeded the upper level in 49% of 197 products with it. | 5 |
| Zinc, iodine, iron, calcium, manganese | Biological association | Human | Zinc and iodine are among the most common minerals; calcium appears in few products; iron and manganese are the main safety and label-accuracy issues. | 5 7 16 |
Each connection is stored with the ingredient, the connected record, the kind of connection, the evidence status, the supporting studies, the preparation or compound involved, and a review date (last reviewed October 26, 2026).
Evidence at a glance: what the research found for 7 outcomes
Each outcome below is one thing researchers measured. Certainty is how far the evidence can be trusted, not how well it works. The full studies are on the next tab.
The evidence
The research centre for Children's Multivitamins. Every record here was checked against PubMed or the publisher's page; we never list a study we have not verified.
Evidence by outcome
Bars show how many studies we found for each outcome, not how well it works. People are added up across trials only (reviews are not added, to avoid double counting).
How we rate evidence
High certainty
Several well-run trials or reviews agree; further research is unlikely to change the picture much.
Moderate certainty
Good trials point the same way, but some doubt remains.
Low certainty
Small, short or inconsistent trials. The finding could change with better research.
Very low certainty
Very little or very weak human data. Treat as a possibility only.
Mixed findings
Trials or reviews disagree with each other.
Not enough evidence
Not enough human research to say either way.
Evidence against
Good research found no benefit, or found harm.
We take the reviewers' own risk-of-bias and GRADE statements where they exist, and otherwise judge from study size, design, consistency, directness and whether a product matches what is sold. Many publications do not make evidence high. Method note: We searched PubMed for trials, reviews, label surveys and lab tests of children's multivitamins and read the abstract of every study cited. We also read the NHS, MedlinePlus, FDA and EFSA pages cited. The NIH Office of Dietary Supplements page was blocked and is marked unverified. Results from single nutrients are not added up as if the mix was tested.
Study library: every study we checked 19
| Study | Design | People | Product, dose, length | Result |
|---|---|---|---|---|
| Bailey 2012 Do dietary supplements improve micronutrient sufficiency in children and adolescents? J Pediatr · PMID 22717218 · DOI |
Cross sectional survey |
7250 US children aged 2 to 18 years, National Health and Nutrition Examination Survey 2003-2006 |
Dietary supplements (all types) Various · vs Non-users |
Supplement use was 21% in under-2s and 42% in ages 2 to 8. Calcium and vitamin D intakes were low in all children. In ages 2 to 8, inadequate intakes of most nutrients were minimal from food alone. In ages 9 to 18, magnesium, phosphorus and vitamins A, C and E were more often inadequate. Supplement use raised the chance of intakes above the upper level for iron, zinc, copper, selenium, folic acid and vitamins A and C. Even with supplements, more than a third of children missed calcium and vitamin D recommendations. Children aged 2 to 8 had adequate diets whether or not they used supplements. Not applicable (survey) (Not applicable) Methods, limits and fundingOutcomes: Micronutrient intakes from food with and without supplements; share below adequacy and above upper levels Limitations: Data are from 2003-2006 and two 24-hour recalls. Survey data show intakes, not health results. Products and law have changed since. Funding and conflicts: Authors declared no conflicts of interest. Read: abstract |
| Christensen 2023 Dietary supplements increase the risk of excessive micronutrient intakes in Danish children. Eur J Nutr · PMID 37127694 · DOI |
Cross sectional survey |
499 Danish children aged 4 to 10 years from the 2011-2013 national diet survey; 64% used dietary supplements, and multivitamin-mineral products were the most used type (60%) |
Dietary supplements, mainly multivitamin-minerals Various · vs Non-users |
Users had higher total intakes of 15 micronutrients than non-users. Diet alone pushed 12% to 30% of children over the upper level for vitamin A, zinc and iodine. Supplement use led to 21% to 73% of children exceeding the upper levels for those three, and 6% to 45% exceeding the iron level. The authors say the long-term health effects of exceeding these levels in children are unknown. Upper levels exceeded: vitamin A, zinc, iodine 21-73% of children with supplement use; iron 6-45% (Not given in the abstract) Methods, limits and fundingOutcomes: Micronutrient intake from diet and supplements compared with reference intakes and tolerable upper intake levels Limitations: Diet data from 2011-2013. Intakes are self-reported. Exceeding an upper level is a risk signal, not proof of harm. Funding and conflicts: Authors declared no conflict of interest. Read: abstract |
| Crawford 2021 Pediatric ingestions with gummy formulated medications: a retrospective study. Clin Toxicol (Phila) · PMID 33021391 · DOI |
Retrospective case series |
66059 Children aged 0 to 19 years who were the subject of calls to one US regional poison control centre, 2015-2017 (1,143 gummy exposures; 1,098 analysed) |
Gummy-formulated medicines and supplements (vitamins 74%, melatonin 24%) Gummy · vs Other exposures |
Of 66,059 child exposures, 1,143 (1.7%) involved gummy products. Median age was 3 years and 7% had symptoms. Seventy-four percent of the gummy exposures involved vitamins and 24% melatonin. Melatonin exposures had 8.4 times the odds of symptoms compared with other gummies. Main symptoms were drowsiness, stomach upset and hyperactivity. Two children were hospitalised after taking several medicines, one of them a suicide attempt. The authors say symptoms are rare but gummy products, especially those with melatonin, should be stored safely. Symptomatic 7%; melatonin odds ratio 8.4 for symptoms versus other gummies (Melatonin OR 8.4 (95% CI 5.1 to 14)) Methods, limits and fundingOutcomes: Symptoms, emergency visits and hospital stays after gummy ingestion Limitations: One region, 3 years. Poison-centre calls are voluntary reports and do not give the product amount in every case. The gummy vitamin group is not split by whether iron was in the product. Funding and conflicts: No conflict statement in the record read. Read: abstract |
| De-Regil 2017 Point-of-use fortification of foods with micronutrient powders containing iron in children of preschool and school-age. Cochrane Database Syst Rev · PMID 29168569 · DOI |
Systematic review meta analysis |
5810 13 trials (5,810 children aged 24 months to 12 years) in Latin America, Africa and Asia, including places where anaemia is common |
Iron-containing multiple micronutrient powders (2 to 18 nutrients) mixed into food Powder sprinkled on food Iron from 2.5 mg to 30 mg in different trials (studied in the trials) Varied by trial · vs No intervention or placebo |
Compared with no intervention or placebo, iron-containing powders lowered anaemia (prevalence ratio 0.66, moderate quality) and iron deficiency (0.35, moderate quality), and raised haemoglobin by 3.37 g/L (low quality). No effect on diarrhoea (low quality). Only one trial reported deaths (none). The authors say information on illness, development and adverse effects is scarce. Anaemia PR 0.66; iron deficiency PR 0.35; haemoglobin MD 3.37 g/L (Anaemia 0.49 to 0.88; iron deficiency 0.27 to 0.47; haemoglobin 0.94 to 5.80) Methods, limits and fundingOutcomes: Anaemia, iron deficiency, haemoglobin, mortality, diarrhoea Limitations: Trials were in places with a lot of anaemia, and used powders, not pills or gummies. Adverse effects were rarely reported. Funding and conflicts: Review author is a full-time staff member of Nutrition International, an organisation that provides micronutrient programmes. Read: abstract |
| Dwyer 2022 Do Multivitamin/Mineral Dietary Supplements for Young Children Fill Critical Nutrient Gaps? J Acad Nutr Diet · PMID 34687947 · DOI |
Cross sectional label survey |
288 All 288 multivitamin/mineral products labelled for children aged 1 to under 4 years in the US NIH Dietary Supplement Label Database in 2018 |
Children's multivitamin/mineral products (label contents, not lab tests) Various forms · vs Daily Values for age and upper tolerable intake levels |
The 288 products contained on average 10.1 vitamins and 4.59 minerals. The most common were vitamins C, A, D, E, B6 and B12, then zinc, biotin, pantothenic acid, iodine and folic acid. Of 281 products with vitamin D, 56% gave at least half the Daily Value; of 144 with calcium, 4%; none of 60 with potassium. The upper level was exceeded by 49% of 197 products with folic acid, 17% of 283 with vitamin A and 14% of 264 with zinc. Most products contained many nutrients that national surveys show are already plentiful in children's diets. Upper level exceeded: folic acid 49% of 197, vitamin A 17% of 283, zinc 14% of 264 (Not applicable) Methods, limits and fundingOutcomes: Number of nutrients per product; amounts suggested on labels compared with Daily Values and upper intake levels Limitations: Reads label amounts, not what is actually in the product. One year (2018) and one country. Does not measure what children eat or any health result. Funding and conflicts: Authors work at NIH Office of Dietary Supplements, USDA, Purdue and Abt Associates; no product-maker funding stated. Some authors report unrelated food-company advisory roles. Read: abstract |
| Elbatanony 2026 Influence of two pediatric multivitamin forms on surface characteristics and color stability of single-shade composite, nanofilled composite, and glass ionomer cement: an in vitro study. BMC Oral Health · PMID 42251354 · DOI |
Laboratory study lab |
135 135 test pieces of three tooth-filling materials, with no people involved |
One gummy and one chewable tablet pediatric multivitamin dissolved in artificial saliva Gummy and chewable tablet Daily 69-second soak cycles 6 months (simulated) · vs Artificial saliva |
Both solutions reduced hardness and increased roughness of all three filling materials compared with artificial saliva. The gummy lowered hardness more than the chewable tablet in two of the three materials. Colour changes stayed within what is clinically acceptable. The authors say gummy and chewable forms contain citric and ascorbic acid and can fall below the pH where erosion starts (5.5). Hardness lower and roughness higher with both products (Not applicable) Methods, limits and fundingOutcomes: Surface hardness, roughness and colour change of filling materials Limitations: Laboratory only: no teeth, no children, no decay outcome. Two products tested. Does not show harm or benefit to children's teeth. Funding and conflicts: Authors declared no competing interests. Read: abstract |
| Frisbie 2026 Excessive manganese content in children's multivitamin supplements: Potential for neurodevelopmental harm and other adverse health outcomes. PLoS One · PMID 41849337 · DOI |
Laboratory analysis lab |
52 52 children's multivitamin and mineral products bought in tablet, capsule, gummy, powder and liquid forms; 26 listed added manganese and 26 did not |
Children's multivitamin/mineral products (lab measurement of manganese) Tablets, capsules, gummies, powders, liquids · vs Labelled manganese and Institute of Medicine upper intake levels |
Of 26 products listing added manganese, 23 (88.5%) contained more than the label showed and 3 (11.5%) less; the mean difference was 42.5%. One liquid would exceed the upper level from labelled amounts alone; 5 (19%) would exceed it by measured amounts; 9 (34.6%) would exceed it by measured amounts if used on top of an ordinary diet. Of 26 products with no manganese listed, 13 (50%) still had measurable manganese, and none would exceed upper levels. Mean difference label versus measured manganese: 42.5% (Not given in the abstract) Methods, limits and fundingOutcomes: Measured manganese compared with the label and with upper intake levels Limitations: Only 52 products and only manganese was measured. Upper-level comparisons depend on assumed daily use. Brands and years are not generalisable. Funding and conflicts: Authors declared no competing interests; one author is at a non-profit laboratory. Read: abstract |
| Lehmkuhler 2020 Certified food dyes in over the counter medicines and supplements marketed for children and pregnant women. Food Chem Toxicol · PMID 32599104 · DOI |
Laboratory analysis lab |
Prenatal vitamin tablets, children's chewable and gummy vitamins, and children's and adult pain, cough and cold products (number not given in the abstract) | Certified food dyes (Red 40, Yellow 5, Yellow 6, Blue 1, Blue 2) in children's chewable and gummy vitamins and other products Chewable, gummy, tablet, syrup |
Dye levels varied between products, with the highest levels in pain-relief and cough/cold syrups. Large differences were seen within some brands. Some dyes broke down in the vitamin gummies. The abstract gives the Red 40 intake above the US accepted daily intake only for some syrups, not for vitamins. Not applicable (Not applicable) Methods, limits and fundingOutcomes: Dye levels measured by liquid chromatography Limitations: The abstract does not give vitamin dye amounts. The paper links dyes to behaviour in some children in its introduction; that is background, not a result of this study. Funding and conflicts: No conflict statement in the record read. Read: abstract |
| Locks 2017 The effect of daily zinc and/or multivitamin supplements on early childhood development in Tanzania: results from a randomized controlled trial. Matern Child Nutr · PMID 27189038 · DOI |
Randomised controlled trial |
2400 2,400 infants in Tanzania randomised at 6 weeks of age; development tested at about 15 months in a sub-sample of 247 |
Multivitamin (vitamins C, E and B-complex), zinc, both, or placebo Daily supplement Amount not given in the abstract From 6 weeks of age to about 15 months · vs Placebo |
No significant difference in any of the five development areas between any of the four groups, between zinc and no zinc, or between multivitamin and no multivitamin. No difference in the odds of a low score. The authors recommend looking for other ways to support early development in vulnerable groups. No significant difference in mean development scores (Not given in the abstract) Methods, limits and fundingOutcomes: Bayley Scales of Infant and Toddler Development III scores (cognitive, language, motor) Limitations: Infants in Tanzania, not well-fed children elsewhere. The multivitamin was B-complex, C and E only (no vitamins A or D, no minerals). Only 247 of 2,400 were tested for development. Funding and conflicts: Authors declared no conflict of interest. Read: abstract |
| Samuel 2023 An analysis of nutrient facts labels of pediatric multi-vitamin and mineral supplements: Is there a risk of overexposure? Nutr Health · PMID 35538899 · DOI |
Cross sectional label survey |
Pediatric multivitamin/mineral supplement packages sold by three large US retail pharmacy chains (number of products not given in the abstract) | Children's multivitamin/mineral products (label contents) Various forms · vs Recommended Dietary Allowance and tolerable upper limit |
More than a third of the samples contained vitamin A, and almost a fifth contained niacin, at or above the established upper limit for children aged 1 to 3 years. A major proportion had child-friendly and parent-targeted promotional language on the package. More than one third (vitamin A) and almost one fifth (niacin) at or above the upper limit for ages 1 to 3 (Not given in the abstract) Methods, limits and fundingOutcomes: Micronutrient amounts on labels; cartoon characters and parent-targeted claims on packaging Limitations: Reads labels only; the abstract does not give the number of products or the stores. No lab testing. Funding and conflicts: Authors declared no conflicting interests. Read: abstract |
| Suchdev 2020 Home fortification of foods with multiple micronutrient powders for health and nutrition in children under two years of age. Cochrane Database Syst Rev · PMID 32107773 · DOI |
Systematic review meta analysis |
33147 29 trials (33,147 children aged 6 to 23 months) in low- and middle-income countries where anaemia is common; 26 trials (27,051 children) gave data |
Multiple micronutrient powders (5 to 22 nutrients, with at least iron, zinc and vitamin A) mixed into semi-solid food Powder sprinkled on food Varied by trial 2 to 44 months · vs No intervention, placebo, or iron drops |
Compared with no intervention or placebo, powders cut anaemia by 18% (moderate certainty) and iron deficiency by 53% (high certainty). Haemoglobin and iron status were higher. No effect on weight-for-age (moderate certainty). Few trials reported illness, and powders did not raise diarrhoea, chest infections, malaria or all-cause illness. Information on side effects was scarce. The authors say benefits for survival or development are unclear. Anaemia RR 0.82; iron deficiency RR 0.47; weight-for-age MD 0.02 (Anaemia 0.76 to 0.90; iron deficiency 0.39 to 0.56; weight-for-age -0.03 to 0.07) Methods, limits and fundingOutcomes: Anaemia, iron status, haemoglobin, weight-for-age, illness Limitations: Powders on food in poorer countries are not the same as multivitamin gummies or chewables in well-fed children. Many trials were not blinded. Side effects and illness were poorly reported. Funding and conflicts: Mostly government or foundation funding; only two trials industry funded. Review authors report ties to CDC and Nutrition International, which run micronutrient programmes. Read: abstract |
| Wagner 2019 Bioequivalence Studies of Vitamin D Gummies and Tablets in Healthy Adults: Results of a Cross-Over Study. Nutrients · PMID 31067745 · DOI |
Randomised crossover trial |
40 Healthy adults aged 18 to 45 (9 in a first study, 31 in a second) |
Vitamin D3 as gummies versus tablets (adults, one nutrient) Gummy and tablet 20,000 IU single dose (studied in the trial) Single dose, blood sampled for 48 hours, two weeks washout · vs The other form |
In the larger study, blood vitamin D3 rose more after gummies than tablets (area under curve 1,474 versus 774 ng.h/mL; peak 47.3 versus 23.4 ng/mL). The authors say gummies had greater bioavailability for this one product and dose. Gummy AUC 1474 vs tablet 774 ng.h/mL; peak 47.3 vs 23.4 ng/mL (Gummy AUC 1393 to 1555; tablet AUC 693 to 855) Methods, limits and fundingOutcomes: Blood vitamin D3 concentrations over time Limitations: Adults, a single high dose of one vitamin, one gummy and one tablet. Does not say how children absorb the vitamins in a multivitamin. Higher absorption is not the same as better health. Funding and conflicts: Authors declared no conflict of interest. Read: abstract |
| s-efsa-ul-v11 EFSA: Overview on Tolerable Upper Intake Levels as derived by the SCF and the EFSA NDA Panel, version 11 (August 2025) · Source |
Regulatory opinion n/a |
Methods, limits and fundingRead: full-text | ||
| s-fda-daily-value FDA: Daily Value on the Nutrition and Supplement Facts Labels (content current 2024-03-05) · Source |
Regulator page n/a |
Methods, limits and fundingRead: full-text | ||
| s-fda-dshea FDA: Information for Consumers on Using Dietary Supplements (content current 2022-10-21) · Source |
Regulator page n/a |
Methods, limits and fundingRead: full-text | ||
| s-medlineplus-iron-overdose MedlinePlus Medical Encyclopedia: Iron overdose (review date 2025-10-14) · Source |
Reference database n/a |
Methods, limits and fundingRead: full-text | ||
| s-medlineplus-prenatal MedlinePlus (AHFS patient information): Prenatal vitamins (last revised 2025-03-15) · Source |
Reference database n/a |
Methods, limits and fundingRead: full-text | ||
| s-nhs-vitamins-children NHS: Vitamins for children (page last reviewed 30 May 2024) · Source |
Health agency n/a |
Methods, limits and fundingRead: full-text | ||
| s-ods-multivitamin NIH Office of Dietary Supplements: Multivitamin/mineral supplements fact sheet · Source |
Regulator page n/a |
Methods, limits and fundingRead: not-read |
What we do not know yet
- No trial of a gummy or chewable multivitamin for health results in well-fed children was found.
- No study compared gummies, chewables, drops and liquids in children.
- Only manganese label accuracy was tested in the lab studies read; other nutrients, heavy metals and undeclared ingredients were not.
- The US survey data read are from 2003-2006.
- The NIH Office of Dietary Supplements fact sheet could not be read.
- No interaction, pregnancy or kidney or liver safety data for children's multivitamins were found.
How new research is added
New studies are found by a saved PubMed search and placed in a review queue before the page changes.
Lab markers
What changed in blood or saliva tests during trials. A changed number is not the same as feeling or being healthier, and we give no "normal ranges".
Other 4
Intake of vitamins and minerals compared with recommendations
Higher with supplements, both toward adequacy and toward excess in trials
How much of each nutrient a child gets from food and supplements, compared with the amount that meets needs and the amount above which risk may rise.
Low certaintyResults and what it means
Why it was measured
To see whether children eat enough and whether supplements help or push intakes too high.
Statistical vs. clinical meaning
Intake is not the same as health results.
Safety implication
Supplement use raised the chance of intakes above upper levels for iron, zinc, copper, selenium, folic acid and vitamins A and C.
| Study | Result | People | Product |
|---|---|---|---|
| 1 | Supplement users had higher intakes; users aged 2 to 8 were adequate with or without supplements; calcium and vitamin D stayed low even with supplements | 7,250 US children aged 2 to 18 | Any dietary supplement |
Development scores (Bayley III)
No difference in trials
A test of thinking, language and movement skills in infants and toddlers.
Not enough evidenceResults and what it means
Why it was measured
To see whether a multivitamin changes early development.
Statistical vs. clinical meaning
One trial, in a different setting.
Safety implication
Not reported in the abstract.
| Study | Result | People | Product |
|---|---|---|---|
| 9 | No significant difference in any of five areas | 247 tested infants in Tanzania | Daily multivitamin (B-complex, C, E) from 6 weeks |
Anaemia and iron deficiency
Less anaemia and less iron deficiency in trials
Anaemia is a low blood haemoglobin level. Iron deficiency is a low iron store, measured with blood tests.
Moderate certaintyResults and what it means
Why it was measured
To see whether iron-containing powders improve iron status in young children.
Statistical vs. clinical meaning
Applies to iron-containing powders in places with a lot of anaemia.
Safety implication
Adverse effects were rarely reported.
| Study | Result | People | Product |
|---|---|---|---|
| 11 | Anaemia RR 0.82; iron deficiency RR 0.47; haemoglobin +2.74 g/L (low certainty) | 26 trials with data, children 6 to 23 months | Multiple micronutrient powders on food |
| 4 | Anaemia PR 0.66; iron deficiency PR 0.35; haemoglobin +3.37 g/L (low quality) | 13 trials, 5,810 children aged 2 to 12 | Iron-containing micronutrient powders on food |
Blood vitamin D3 after a gummy or tablet
Higher after the gummy in trials
The amount of vitamin D3 in blood over 48 hours after one dose.
Very low certaintyResults and what it means
Why it was measured
To compare how much vitamin D the body takes up from each form.
Statistical vs. clinical meaning
Adults, one nutrient, one dose; says nothing about children's multivitamins.
Safety implication
Not measured.
| Study | Result | People | Product |
|---|---|---|---|
| 12 | Area under curve 1,474 versus 774 ng.h/mL; peak 47.3 versus 23.4 ng/mL | 31 healthy adults (second study) | Vitamin D3 gummy versus tablet, single dose |
Safety
What studies and official sources say about side effects, medicines and who should check first. Each point shows what kind of evidence it comes from.
Main points to know 5
- Iron in vitamins can poison a child who swallows many. MedlinePlus says iron overdose is particularly dangerous for children. A severe overdose can happen if a child eats adult multivitamins, such as prenatal vitamins. If a child eats too many pediatric multivitamins, the effect is usually minor. Children may eat large numbers of iron pills because they look like candy. First signs are stomach and bowel symptoms (vomiting, diarrhoea, black or bloody stools). Symptoms can fade for a few hours and return. Severe liver damage can come 2 to 5 days later, and some people have died up to a week after an overdose. Call poison control (US 1-800-222-1222) or emergency services at once; do not wait for symptoms. Authoritative guidance 16 17
- Some children's products carry more than the upper limit for a nutrient. A review of 288 US products labelled for ages 1 to under 4 found the upper level exceeded by 49% of 197 products with folic acid, 17% of 283 with vitamin A and 14% of 264 with zinc. A separate label survey found more than a third of products had vitamin A, and almost a fifth niacin, at or above the upper limit for ages 1 to 3. Upper limits are totals from all sources, so food, fortified cereals and other supplements add to the same total. Label survey 5 10 13
- Measured contents can differ from the label. In a 2026 lab test of 52 children's products, 23 of the 26 that listed added manganese contained more than the label showed (average difference 42.5%). Five of the 26 (19%) would pass the upper level by measured manganese, and half of the products that did not list manganese still had some. Only manganese was measured, so accuracy for other nutrients is unknown. Laboratory analysis 7
- Giving two products at once can double up on vitamins A and D. The NHS says having too much of some vitamins can be harmful, and warns against giving a child two supplements at the same time, for example cod liver oil and vitamin drops, which both contain vitamins A and D. In Danish children, supplement use pushed 21% to 73% over upper levels for vitamin A, zinc or iodine, and 6% to 45% for iron; the long-term effects of exceeding these levels in children are unknown. Authoritative guidance and survey 18 2
- Gummies are a common reason for poison-centre calls. In one US region (2015-2017), 1,143 of 66,059 child exposure calls (1.7%) involved gummy products. The median age was 3 years, 74% involved vitamins, and 7% of children had symptoms. The authors advise safe storage. Retrospective case series 3
Side effects 4
| Effect | How often | Severity and recovery | Evidence |
|---|---|---|---|
| Iron poisoning after swallowing many iron-containing vitamins Amounts that cause poisoning depend on the child's size and the product; ask poison control. | Not given; a usually minor effect is described for pediatric multivitamins, a severe one for adult and prenatal products | Can be severe or fatal Recovery is likely with prompt treatment; liver damage can appear days later | Authoritative guidance 16 |
| Symptoms after swallowing gummy vitamins Melatonin gummies had 8.4 times the odds of symptoms compared with other gummies. | 7% of 1,098 analysed gummy exposures (all gummy products, mostly vitamins) | Mostly mild; drowsiness, stomach upset and hyperactivity were the main symptoms, mostly with melatonin gummies Not given | Retrospective case series 3 |
| Intakes above upper limits from supplements Exceeding an upper limit is a risk signal, not proof of harm. | Varies by nutrient and survey; see the key warnings | Unknown; the Danish authors say long-term effects in children are unknown Not known | Survey 2 1 |
| Side effects in the micronutrient-powder trials Both reviews say side-effect reporting was scarce. Powders did not raise diarrhoea, chest infections or malaria in the trials that reported them. | Not given in the abstracts | Not given Not given | Meta-analysis 11 4 |
Liver
MedlinePlus says severe liver damage can occur 2 to 5 days after an iron overdose. No other liver safety data for children's multivitamins were read. 16
How often. No frequency was found.
Monitoring. After a suspected iron overdose, MedlinePlus says hospitals check blood iron levels and other tests.
This is a safety connection. It is not evidence that Children's Multivitamins supports liver health.
Medicines and supplements 4
| With | Why it matters | Importance | Evidence | What to do |
|---|---|---|---|---|
| Other supplements with the same nutrients (for example cod liver oil with vitamin drops) supplement | Both contain vitamins A and D, so amounts add up. | The NHS warns against giving two supplements at the same time. | Authoritative guidance Moderate certainty 18 | Add up all products before giving more than one. Ask a pharmacist. |
| Fortified foods and drinks food | Fortified cereals, drinks and other foods add the same nutrients. | EFSA says upper levels are total daily intake from all sources; Danish children's totals passed upper levels more often with supplements. | Regulator statement and survey Low certainty 13 2 | Count food and all products together when checking limits. |
| Adult or prenatal multivitamins supplement | Higher iron content. | MedlinePlus says a severe iron overdose can happen if a child eats adult multivitamins, such as prenatal vitamins. | Authoritative guidance Moderate certainty 16 17 | Keep all vitamins out of reach; ask a pharmacist before giving an adult product to a child. |
| Prescription medicines prescription | No mechanism found. | No interaction study of children's multivitamins and any medicine was found in the sources read. | Absence of evidence Not enough evidence | Absence of a study is not proof of safety. Tell the doctor or pharmacist about every vitamin a child takes. |
Who should check first 4
| Situation | Advice | Evidence |
|---|---|---|
| Babies having more than 500 ml of infant formula a day | The NHS says these babies should not be given vitamin supplements because formula is already fortified with vitamins A, C and D and other nutrients. | Authoritative guidance 18 |
| A child who has swallowed vitamins, especially with iron | Call poison control or emergency services straight away. Keep the container to show. | Authoritative guidance 16 17 |
| Children with a medical condition or who take prescribed medicines | No safety study for these groups was read. Ask a doctor or pharmacist before giving a multivitamin. | Absence of evidence |
| Pregnancy and breastfeeding | Not studied for children's products. Adult and prenatal products are different and carry more iron; MedlinePlus says to keep prenatal vitamins out of children's reach. | Authoritative guidance 17 16 |
Overdose, product quality and regulators
Summary. The best-documented harm is iron poisoning. EFSA sets no upper level for iron but gives a safe level of intake; for manganese it also sets no upper level. For other nutrients, EFSA upper levels exist (see the regulator list).
Animal. Not reviewed.
High dose or long term signals. Survey and label studies show products and diets can pass upper levels, but no study read links this to harm in children. The Danish authors say long-term effects are unknown.
Overdose response. Call poison control or emergency services. MedlinePlus lists hospital care that can include fluids, chelation and removal of pills.
Genotoxicity. Not researched.
Label accuracy and additives are the quality issues with evidence. Heavy metals other than manganese and microbial contamination were not found in studies of children's multivitamins in this search.
Manganese above the label. 23 of 26 products listing added manganese contained more than the label (mean 42.5% more). 13 of 26 products that did not list manganese still contained some. 7
Artificial colours in chewable and gummy vitamins. Certified food dyes were measured in children's chewable and gummy vitamins; levels varied between products and within some brands, and some dyes broke down in gummies. The abstract gives no amounts for vitamins, and links dyes to behaviour in some children only as background. 8
Gummy and chewable acidity (lab only). In the lab, both a gummy and a chewable softened and roughened tooth-filling materials. No child or tooth was studied. 6
| Body | Action | Date |
|---|---|---|
| EFSA (European Food Safety Authority) (European Union) | Tolerable upper intake levels, total per day from all sources, for ages 1-3 / 4-6 / 7-10 / 11-14: vitamin A (retinol equivalents) 800 / 1,100 / 1,500 / 2,000 micrograms; folic acid from supplements and fortified foods 200 / 300 / 400 / 600 micrograms; vitamin D 50 / 50 / 50 / 100 micrograms; zinc 7 / 10 / 13 / 18 mg; iodine 200 / 250 / 300 / 450 micrograms. No upper level for iron, whose safe level of intake is 10 / 15 / 20 / 30 mg for ages 1-3 / 4-6 / 7-10 / 11-14. No upper level for manganese. These are not targets. source | 2025-08 |
| NHS (UK) (United Kingdom) | The government recommends all children aged 6 months to 5 years be given vitamin supplements containing vitamins A, C and D every day. Babies having more than 500 ml of infant formula a day should not be given them. Breastfed babies should have a daily vitamin D supplement from birth. Children aged 1 to 4 should be given a daily supplement with 10 micrograms of vitamin D. It says only supplements with A, C and D are recommended, warns about too much of some vitamins, and says to ask a pharmacist. source | 2024-05-30 |
| U.S. Food and Drug Administration (United States) | Says FDA is not authorised to approve dietary supplements for safety and effectiveness before they are marketed, and that in many cases firms can introduce supplements without notifying FDA. Advises talking to a doctor or pharmacist before using a supplement. source | 2022-10-21 |
| MedlinePlus (US National Library of Medicine) (United States) | Iron overdose is particularly dangerous for children; a severe overdose can happen with adult multivitamins such as prenatal vitamins; pediatric multivitamin overdose is usually minor. Poison Help line 1-800-222-1222. source | 2025-10-14 |
| U.S. Food and Drug Administration (United States) | Explains the Daily Value (DV) as a reference amount and the % Daily Value as how much a serving of a packaged food or supplement contributes toward it; the Supplement Facts label must list certain nutrients when present. source | 2024-03-05 |
When to get medical help
- A child may have swallowed vitamins, especially with iron, or adult or prenatal vitamins: call poison control (US 1-800-222-1222) or emergency services now, even if the child seems well.
- Call emergency services if the child has collapsed, had a seizure, has trouble breathing or cannot be woken.
- Vomiting (especially with blood), black or bloody stools or severe diarrhoea after swallowing vitamins: get medical help straight away.
- Symptoms that seem to fade and then return, or yellow skin or eyes in the days after an overdose: get medical help (possible liver injury).
- Swelling of the face or lips, hives or wheezing after a vitamin: call emergency services (allergy to an ingredient).
Stop using the product and contact a clinician or emergency service. In the US, Poison Control is 1-800-222-1222.
General information only, not medical advice. Ask a clinician or pharmacist before use, especially with medicines, in pregnancy or with a health condition. See the Natural Remedy Safety guide.
Frequently asked questions
What is a children's multivitamin?
It is one product with several vitamins and often minerals, made for young children. It comes as gummies, chewables, drops, liquids and powders.
What is usually inside one?
A review of 288 US products for ages 1 to under 4 found about 10 vitamins and 4 to 5 minerals on average. Vitamins C, A, D, E, B6 and B12 were most common, then zinc, biotin, pantothenic acid, iodine and folic acid.
Does my child need one?
Do children's multivitamins help children grow or learn?
Can a child be poisoned by vitamins?
Are gummy vitamins safe for children?
In one US region, 1.7% of child poison-centre calls involved gummy products and 7% of those children had symptoms. Store all vitamins out of reach. No study compared gummies with other forms for children.
Can I give my child an adult or prenatal multivitamin?
Does the label always match what is inside?
Not always. In a 2026 lab test of 52 children's products, 23 of 26 that listed added manganese had more than the label showed. Other nutrients were not tested.
What are upper limits for children?
An upper limit is the highest total daily intake from all sources not expected to cause harm. EFSA lists them by age (see the Overview tab). They are not targets.
Can two products add up to too much?
Do multivitamin powders help with anaemia?
Are there artificial colours in children's vitamins?
A lab study measured certified food dyes in children's chewable and gummy vitamins and found levels varied between products and within some brands. Check the ingredient list.
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Editorial transparency
- Written by
- AlternativeMed editorial team. Research compiled with AI assistance, then checked against the sources listed.
- Medical review
- None. This page has not been reviewed by a physician or pharmacist.
- First published
- 2026-10-26
- Last substantive update
- 2026-10-26
- How we research
- We searched PubMed for trials, reviews, label surveys and lab tests of children's multivitamins and read the abstract of every study cited. We also read the NHS, MedlinePlus, FDA and EFSA pages cited. The NIH Office of Dietary Supplements page was blocked and is marked unverified. Results from single nutrients are not added up as if the mix was tested.
- How we rate evidence
- See "How we rate evidence" in the Evidence tab.
- Independence
- No product is promoted on this page. No brands or affiliate links are shown. Funding is flagged where the records show it.
Sources 19
Each source was opened and checked. Where we read only the abstract, it says so. The small numbers in the text point here.
- Bailey RL, Fulgoni VL 3rd, Keast DR, et al.. Do dietary supplements improve micronutrient sufficiency in children and adolescents?. J Pediatr. 2012. PMID 22717218. DOI 10.1016/j.jpeds.2012.05.009. (abstract)
- Christensen C, Matthiessen J, Fagt S, et al.. Dietary supplements increase the risk of excessive micronutrient intakes in Danish children.. Eur J Nutr. 2023. PMID 37127694. DOI 10.1007/s00394-023-03153-5. (abstract)
- Crawford EB, Coco T, Gaines L, et al.. Pediatric ingestions with gummy formulated medications: a retrospective study.. Clin Toxicol (Phila). 2021. PMID 33021391. DOI 10.1080/15563650.2020.1822532. (abstract)
- De-Regil LM, Jefferds MED, Peña-Rosas JP. Point-of-use fortification of foods with micronutrient powders containing iron in children of preschool and school-age.. Cochrane Database Syst Rev. 2017. PMID 29168569. DOI 10.1002/14651858.CD009666.pub2. (abstract)
- Dwyer JT, Saldanha LG, Bailen RA, et al.. Do Multivitamin/Mineral Dietary Supplements for Young Children Fill Critical Nutrient Gaps?. J Acad Nutr Diet. 2022. PMID 34687947. DOI 10.1016/j.jand.2021.10.019. (abstract)
- Elbatanony MM, El Shahawi AM, Zaki DY. Influence of two pediatric multivitamin forms on surface characteristics and color stability of single-shade composite, nanofilled composite, and glass ionomer cement: an in vitro study.. BMC Oral Health. 2026. PMID 42251354. DOI 10.1186/s12903-026-08673-0. (abstract)
- Frisbie SH, Mitchell EJ, Hoeltge A, et al.. Excessive manganese content in children's multivitamin supplements: Potential for neurodevelopmental harm and other adverse health outcomes.. PLoS One. 2026. PMID 41849337. DOI 10.1371/journal.pone.0343600. (abstract)
- Lehmkuhler AL, Miller MD, Bradman A, et al.. Certified food dyes in over the counter medicines and supplements marketed for children and pregnant women.. Food Chem Toxicol. 2020. PMID 32599104. DOI 10.1016/j.fct.2020.111499. (abstract)
- Locks LM, Manji KP, McDonald CM, et al.. The effect of daily zinc and/or multivitamin supplements on early childhood development in Tanzania: results from a randomized controlled trial.. Matern Child Nutr. 2017. PMID 27189038. DOI 10.1111/mcn.12306. (abstract)
- Samuel L, Ethan D, Basch C, et al.. An analysis of nutrient facts labels of pediatric multi-vitamin and mineral supplements: Is there a risk of overexposure?. Nutr Health. 2023. PMID 35538899. DOI 10.1177/02601060221100926. (abstract)
- Suchdev PS, Jefferds MED, Ota E, et al.. Home fortification of foods with multiple micronutrient powders for health and nutrition in children under two years of age.. Cochrane Database Syst Rev. 2020. PMID 32107773. DOI 10.1002/14651858.CD008959.pub3. (abstract)
- Wagner CL, Shary JR, Nietert PJ, et al.. Bioequivalence Studies of Vitamin D Gummies and Tablets in Healthy Adults: Results of a Cross-Over Study.. Nutrients. 2019. PMID 31067745. DOI 10.3390/nu11051023. (abstract)
- . EFSA: Overview on Tolerable Upper Intake Levels as derived by the SCF and the EFSA NDA Panel, version 11 (August 2025). . . (full-text)
- . FDA: Daily Value on the Nutrition and Supplement Facts Labels (content current 2024-03-05). . . (full-text)
- . FDA: Information for Consumers on Using Dietary Supplements (content current 2022-10-21). . . (full-text)
- . MedlinePlus Medical Encyclopedia: Iron overdose (review date 2025-10-14). . . (full-text)
- . MedlinePlus (AHFS patient information): Prenatal vitamins (last revised 2025-03-15). . . (full-text)
- . NHS: Vitamins for children (page last reviewed 30 May 2024). . . (full-text)
- . NIH Office of Dietary Supplements: Multivitamin/mineral supplements fact sheet. . . (not-read)
Where to buy
Check the label first. Whatever you buy, look for these:
- The amount of the active ingredient per serving, not just the front-label claim
- A third-party testing mark (USP, NSF or ConsumerLab)
- Other ingredients and allergens
- Ask a pharmacist about interactions with your medicines
Talk to a pharmacist or doctor before you start any supplement, especially if you take medicines. See the Safety tab for interactions.
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