Fortified Foods
What fortified foods are, how U.S. policy describes fortification, what trials found for vitamin D milk and plant sterol spreads, and what labels can and cannot tell you.
Content last updated . This page has not been medically reviewed.
Safety first. Natural products can cause side effects and interact with medicines. Read functional food safety before you use anything on this page.
Overview
A fortified food has nutrients added to it. Sometimes the nutrient was never in the food, and sometimes it was lost in processing and put back. Common examples are some breakfast cereals, fat spreads, milks and plant-based milks. A fortified food is not a dietary supplement, and it is not the same as a food that is naturally rich in a nutrient. This page is information only. A clinician or registered dietitian can say what is right for a person.
How U.S. policy describes fortification
The U.S. Food and Drug Administration (FDA) has a written set of principles for adding nutrients to foods. It describes them as a model for manufacturers who choose to fortify. [1]
| Reason the policy gives | What it means in plain words |
|---|---|
| Correct a dietary insufficiency | The shortfall is recognized by the scientific community and known to cause a deficiency disease, and the food suits the job. |
| Restore what processing removed | Bring a nutrient back to the level the food had before storage, handling and processing. |
| Balance nutrients against calories | Add vitamins, minerals and protein in proportion to the calories. |
| Avoid a lesser substitute | Keep a food that replaces a traditional food from being nutritionally poorer. |
The same regulation says FDA does not encourage "indiscriminate addition of nutrients to foods". It also says FDA does not consider it appropriate to fortify fresh produce, meat, poultry or fish products, sugars, or snack foods. [1] The policy is written for U.S. diets and, in its own words, may not apply in other countries. [1]
Some foods have their own rules. For example, the U.S. standard for milk makes adding vitamin D optional, and if it is added, each quart should contain 400 International Units. [2] In the UK, the NHS says cows' milk is generally not fortified with vitamin D, "as it is in some other countries". [3] So the same food can be fortified in one country and not in another.
What research shows for specific fortified foods
Evidence is for a named food and a named outcome. It does not transfer to every fortified product.
| Food | What the source found | Strength of evidence |
|---|---|---|
| Vitamin D-fortified dairy, children 3 to 18 years | A meta-analysis of randomized trials reported higher blood vitamin D levels with vitamin D-fortified dairy. [4] This is a blood marker, not a disease outcome. | Promising but limited (marker only) |
| Spreads and drinks with plant sterols or stanols | A meta-analysis of 124 randomized studies found that intakes of 0.6 to 3.3 g a day gradually lowered LDL cholesterol by 6% to 12% on average. [5] | Established for LDL cholesterol; not shown here for heart attacks |
| Fortified milk, cereals and plant milks as everyday foods | Proper evidence not found for long-term health outcomes. We searched PubMed for systematic reviews of breakfast cereal fortification and children's nutrient intake and found none. | Insufficient evidence |
Plant sterol and stanol foods
Plant sterols and stanols are added to some spreads and drinks. FDA allows a heart-disease health claim for them. The claim must say they should be eaten as part of a diet low in saturated fat and cholesterol, and that diets including them "may" reduce the risk of heart disease. [6] The regulation lists 1.3 g or more a day of plant sterol esters, or 3.4 g or more of plant stanol esters, in two servings at different times of day with other foods. [6] These are the regulatory amounts for the claim, not advice for a reader.
An older meta-analysis of 52 trials reported that sterols and stanols were well tolerated, but it was published in 2005 and covered studies to 2003. [7] We did not find a source we read that names groups who should avoid these products, so we make no claim beyond saying to ask a clinician first. More is on the plant sterols and stanols page.
What labels can tell you
FDA's policy allows the words "enriched", "fortified" and "added" to be used interchangeably to show that vitamins, minerals or protein were added. [1] The label does not tell you whether your own diet needs the nutrient. See reading food labels and a checklist for comparing packaged foods.
Related
Fortified plant milks and cereals · Plant milks · Nutrients and compounds in foods
Frequently asked questions
Is a fortified food better than a supplement?
We did not find a source we read that compares them head to head, so we make no ranking. They are different products with different labeling rules, and FDA's fortification policy is about conventional foods. [1]
Is every food allowed to be fortified?
No. FDA's policy says it does not consider it appropriate to fortify fresh produce, meat, poultry or fish products, sugars, or snack foods such as candies and carbonated beverages. [1]
Is milk fortified with vitamin D everywhere?
No. U.S. milk standards make vitamin D optional. [2] The NHS says UK cows' milk is generally not fortified with it. [3]
Do plant sterol spreads lower LDL cholesterol?
In a meta-analysis of randomized studies, intakes of 0.6 to 3.3 g a day lowered LDL cholesterol by 6% to 12% on average. [5] That is a blood marker, and a clinician decides whether such foods suit a person.
Does "fortified" on a package mean it is healthier?
Not by itself. The word shows a nutrient was added. FDA policy also says claims about added nutrients must not be false or misleading. [1] Check the rest of the label too, including sugar and sodium.
More details: evidence, limits and cautions
The details behind this page: cautions, limits of the evidence and where sources disagree. Open any note to read it.
Safety and individual considerations
- Total intake. Fortified foods and supplements both add nutrients. The FDA policy says an added nutrient should be at a level with reasonable assurance it will not cause excessive intake, counting other sources in the diet. [1] A pharmacist or clinician can review the full picture, including supplements (how supplements and foods differ).
- Pregnancy. Folic acid and iodine have their own official advice. See pregnancy and breastfeeding safety and fortification policy for folic acid, iodine and vitamin D.
- Allergy and special diets. The plant a fortified drink is made from is on the label. See food allergy basics. Call 911 for trouble breathing or swelling of the face or throat.
- Not a cure or a replacement for care. Fortified foods do not treat a deficiency that a clinician has diagnosed.
References
- U.S. Food and Drug Administration, 21 CFR 104.20, Statement of purpose (nutritional quality guidelines for foods): eCFR. Read 2026-10-23.
- U.S. Food and Drug Administration, 21 CFR 131.110, Milk (standard of identity): eCFR. Read 2026-10-23.
- NHS (UK), Vitamin D: nhs.uk. Read 2026-10-23.
- Dairy product supplementation and bone health indices in children aged 3 to 18 years: a meta-analysis of randomized controlled trials. Adv Nutr 2023. PubMed 37414219. Read 2026-10-23.
- Ras RT, Geleijnse JM, Trautwein EA. LDL-cholesterol-lowering effect of plant sterols and stanols across different dose ranges: a meta-analysis of randomised controlled studies. Br J Nutr 2014. PubMed 24780090. Read 2026-10-23.
- U.S. Food and Drug Administration, 21 CFR 101.83, Health claims: plant sterol/stanol esters and risk of coronary heart disease: eCFR. Read 2026-10-23.
- Chen JT, et al. Meta-analysis of natural therapies for hyperlipidemia: plant sterols and stanols versus policosanol. Pharmacotherapy 2005. PubMed 15767233. Read 2026-10-23.