Vitamins & Supplements · Collagen supplement
Multi-Collagen Blends (Types I, II, III, V and X)
Multi-collagen blends (collagen types I, II, III, V and X) · also called Multi-collagen, multi collagen complex, multicolágeno, colágeno multi
A multi-collagen blend is a product that combines collagen from more than one animal source or type on one label, often listed as types I, II, III, V and X. No trial of a five-type blend was found. The few trials of mixed products are small and tested one named product each. The main caution is that a blend can stack allergens such as fish, beef, chicken and egg.
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 Multi-Collagen Blends (Types I, II, III, V and X)
A multi-collagen blend combines collagen types or sources on one label. No trial of a five-type blend was found. Small trials of other mixes are mixed, and a blend can carry several allergens.
What a multi-collagen blend is
Collagen is the main protein of skin, tendon, bone and cartilage. The body has at least 16 types, and I, II and III are the most prominent. A multi-collagen product puts several sources or types on one label, usually types I, II, III, V and X.
Hydrolyzed collagen is collagen broken into small chains of about 3 to 6 kDa. Sources named include cattle, pigs, fish and chicken, and eggshell membrane is another ingredient used in blends.
What each type does in the body
Type I is a scaffold of fibrous cartilage and type II of hyaline and elastic cartilage. Types III, V and VI are minor types found in all cartilage subtypes studied. Type X is found in the hardened layer of joint cartilage. Type V works with type I in skin and the cornea.
Where a type sits in the body does not show that eating it feeds that tissue. No study of taking type V or type X by mouth was found.
Food versus pills
Collagen occurs in the skin, tendon, bone and cartilage of animals, and in eggshell membrane. No USDA or NIH amounts for collagen in foods could be read, so none are given here.
The trials on this page tested supplements. Bone broth, gelatin, bovine, marine and chicken collagen each have their own pages.
What the research shows
There is no trial of a five-type blend. One small trial of a type I, II and III product in 32 adults with meniscus problems found less pain than placebo after 8 weeks, with many other tests unchanged. One trial of chicken type II collagen in knee osteoarthritis was positive but was linked to its maker.
Two trials of mixed products reported better skin scores. A 2025 review of single collagen supplements found no skin effect in independent or higher-quality trials.
At a glance
Traditional uses history, not proof
- Collagen-rich foods such as bone broth and gelatin are traditional sources of collagen
- Sold today as a combined joint and beauty supplement
Studied for research
- Five-type blends as a whole, insufficient evidence
- Meniscus and knee joint symptoms with a type I, II and III product, very low certainty
- Chicken type II collagen and knee osteoarthritis, low certainty
- Skin appearance with collagen-containing products, mixed evidence
- Type V and type X by mouth, insufficient evidence
- Eggshell membrane and knee osteoarthritis, low certainty
Main compounds
- Collagen types I, II, III, V and X
- Hydroxyproline peptides
- Hydrolyzed and undenatured collagen forms
Common forms
- Powders
- Capsules and tablets
- Drinks
- Gummies
- Cow, fish, chicken and eggshell membrane sources
Research links: 2025 trial: type I, II and III collagen product in meniscus problems · 2016 trial: undenatured type II collagen in knee osteoarthritis · 2025 review: collagen and skin ageing by funding source · 2020 case: anaphylaxis from fish collagen gummies · 2006 study: collagen types in human cartilage · Research Library · Genes & Biomarkers Library
What it is and its history
- Accepted scientific name
- Multi-collagen blends (collagen types I, II, III, V and X)
- Common names
- Multi-collagen (English); Multi collagen complex (English); Colágeno multi (tipos I, II, III, V y X) (Spanish); Multicolágeno (Spanish)
- Family or group
- Protein ingredient made from animal tissue or eggshell membrane. The body has at least 16 collagen types; I, II and III are the most prominent (review). A "multi-collagen" label mixes collagen from more than one source or type.
- Harvest and processing
- Made by breaking collagen from animal tissue into small chains of about 3 to 6 kDa (hydrolysis). Sources named for hydrolyzed collagen are bovine, porcine, marine, chicken and fish. Eggshell membrane can be treated with enzymes to release peptides, including type X peptides in one lab process.
- Look-alikes and adulterants
- Name: Collagen peptides (single source); Note: One collagen from one source, with its own page.; Name: Undenatured type II collagen (UC-II); Note: Not broken down; a different kind of product with its own page.; Name: Gelatin; Note: Cooked, partly broken collagen; has its own page.
- 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 |
|---|---|---|---|---|
| Type I collagen | collagen protein | Not read from a source. | Main scaffold of fibrous cartilage; works with type V in skin dermis. 19 14 | Tissue biology |
| Type II collagen | collagen protein | Not read from a source. | Main scaffold of hyaline and elastic cartilage; chicken cartilage is a common source in products. 19 13 17 | Human trial (undenatured and hydrolyzed forms) |
| Type III collagen | collagen protein | Not read from a source. | A minor collagen found in all cartilage subtypes studied; in the meniscus trial it was combined with type I. 19 7 | Human trial (inside one blend) |
| Type V collagen | collagen protein | Not read from a source. | Minor collagen that co-assembles with type I in cornea and skin; lack of it is linked to classic Ehlers-Danlos syndrome. 14 | Tissue biology |
| Type X collagen | collagen protein | Peptides of 963 to 2259 Da found in one enzyme-treated eggshell membrane product (lab). | Found in the calcified layer of joint cartilage; not tested by mouth in people. 19 12 | Laboratory |
Mechanisms, receptors and pathways
| Target or pathway | Gene or receptor | What was found | Level |
|---|---|---|---|
| Digestion into peptides and amino acids | Not specified in the sources read | After 9 people ate gelatin or gelatin hydrolysate, hydroxyproline-containing peptides (Pro-Hyp, Hyp-Gly) rose in plasma within 1 to 2 hours. Whether those pieces reach cartilage or skin was not shown. 8 | Human data |
| Where each collagen type sits in the body | Not specified in the sources read | Type I is a scaffold of fibrous cartilage and type II of hyaline and elastic cartilage; III, V and VI are minor types in all cartilage subtypes; type X is in the calcified layer of joint cartilage. Location in a tissue does not show that eating the type feeds the tissue. 19 14 | Tissue biology |
| Hydroxyproline metabolism to oxalate | Not specified in the sources read | Hydroxyproline from gelatin raised urine glycolate and oxalate compared with whey protein. 9 | Human data |
Absorption, metabolism and elimination
- Absorption
- Digested to small peptides and amino acids; some hydroxyproline peptides appear in blood within 1 to 2 hours of gelatin.
- Distribution
- Not found.
- Metabolism
- Hydroxyproline can be turned into glycolate and oxalate (controlled study).
- Elimination
- Oxalate leaves in urine (controlled study).
- Bioavailability
- Not compared across blends in the sources read.
Isolated compounds versus whole extracts
Multi-collagen blends are processed protein products, not foods. Collagen occurs naturally in skin, bone, cartilage and connective tissue of animals, and in eggshell membrane. No trial comparing food collagen with blend pills was read.
Nutritional composition
Food sources: collagen is found in the skin, tendon, bone and cartilage of animals (review). Product sources named in the studies are chicken sternum cartilage, eggshell membrane, and bovine, porcine, marine and fish tissue. No USDA or NIH figures for the collagen content of foods could be read, so no amounts are stated. Pills, powders and drinks differ from foods, and the trials here tested supplements.
1 mixed findings2 low certainty1 very low certainty3 not enough evidence
What was looked at
The 7 benefits and uses checked for Multi-Collagen Blends (Types I, II, III, V and X), each with how strong the evidence is. Tap one to open it.
- The five-type blend itself (types I, II, III, V and X together)Not enough evidence
- Meniscus and knee joint symptoms (type I, II and III blend)Very low certainty
- Chicken type II collagen (undenatured) and knee osteoarthritis symptomsLow certainty
- Skin appearance with products that contain collagenMixed findings
- Type V and type X collagen taken by mouthNot enough evidence
- What reaches the blood after eating collagenNot enough evidence
- Eggshell membrane, a common blend ingredient, and knee osteoarthritisLow certainty
Lab markers tracked in the studies
Knee pain and function scores (WOMAC, VAS)Skin hydration and elasticityHydroxyproline peptides in blood plasma
What is Multi-Collagen Blends (Types I, II, III, V and X) good for?
The studied uses and how strong the human evidence is for each. The first card matters most: the five-type blend as a whole has no trial. The others are single ingredients or different mixes.
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.
The five-type blend itself (types I, II, III, V and X together)
Not enough evidenceNo trial of a product that combines all five collagen types was found. The trials that exist tested other mixes or single ingredients, so a five-type label has no result of its own.
0 studiesNot applicable: no trial.
Studies, doses and limits
What the trials found
PubMed searches for multi-collagen and five-type collagen supplement trials found no clinical trial of such a blend. The searches turned up laboratory material science papers and unrelated trials only.
Results
No evidence for the five-type combination as a whole.
Effect sizes as reported
No effect sizes: no trial found.
Why this rating
Insufficient because no human trial of a five-type blend was found.
Limits
Absence of a trial found is not proof that blends do not work.
Why researchers looked
Labels list five collagen types because all five exist in the body, and the idea is that taking more types may cover more tissues.
Traditional use
Collagen is a protein found in skin, bone, tendon and cartilage. Animal collagen has long been eaten in foods made from skin, bone and connective tissue.
Proposed mechanism Not established
Not established. Where a type sits in a tissue does not show that eating it feeds that tissue.
A proposed mechanism does not show that the effect happens in people.
Allergy stacking is the main safety point: see the Safety tab.
Meniscus and knee joint symptoms (type I, II and III blend)
Very low certaintyOne small trial gave 32 adults with meniscus problems a branded product with type I and III collagen peptides plus type II hydrolyzed collagen for 8 weeks. Pain, quality of life, fear of movement and foot function scores were better than placebo. Many other tests, such as balance and several walking tests, did not differ.
1 studiesOne branded product of types I, II and III. Studied amounts appear in…
Studies, doses and limits
What the trials found
The 2025 trial had 17 people on the blend and 15 on placebo. Pain, quality of life, kinesiophobia and foot function scores favoured the blend (p < 0.05). Leg strength differed by p = 0.057. Back strength, proprioception, balance and several function tests showed no difference. It was registered after it finished.
Results
Better pain and quality of life scores than placebo in one small trial; most function tests unchanged.
Effect sizes as reported
Numbers of points gained were not given in the abstract.
Why this rating
Very low: one trial of 32 people, 8 weeks, many outcomes tested at once, registered after the trial was done, one branded product.
Form and dose studied
One branded product of types I, II and III. Studied amounts appear in the studies table only.
Who was studied
Adults with meniscopathy (a meniscus problem of the knee).
Limits
Tiny and short. It cannot tell us about other blends, other groups, or long-term effects. Longer trials were called for by the authors.
Why researchers looked
The meniscus is knee cartilage made mostly of type I collagen, with type II fibres, so researchers tested a mix of these types.
Traditional use
Collagen is a protein found in skin, bone, tendon and cartilage. Animal collagen has long been eaten in foods made from skin, bone and connective tissue.
Proposed mechanism Not established
Not established in people. Collagen is digested into small peptides; whether they reach cartilage was not shown.
A proposed mechanism does not show that the effect happens in people.
No safety problem was described in the abstract.
Chicken type II collagen (undenatured) and knee osteoarthritis symptoms
Low certaintyChicken-derived type II collagen is a common ingredient in blends. In one 180-day trial of 191 adults with knee osteoarthritis, a product of undenatured type II collagen lowered total joint symptom scores more than placebo and more than a glucosamine-chondroitin comparison. It is one ingredient, not a blend, and two authors work for its maker.
2 studiesUndenatured type II collagen from chicken sternum cartilage, a differ…
Studies, doses and limits
What the trials found
In the 2016 trial, total WOMAC was lower than placebo (p = 0.002) and lower than glucosamine-chondroitin (p = 0.04). Pain, stiffness and physical function scores also improved; safety outcomes did not differ.
Results
Lower knee symptom scores than placebo in one industry-linked trial.
Effect sizes as reported
Total WOMAC: p = 0.002 vs placebo.
Why this rating
Low: one trial of one branded ingredient from its maker. A large 2024 pooled review of 35 trials of mixed collagen products (not blends) found small-to-moderate pain and function gains with no extra side effects, but it pools different products.
Form and dose studied
Undenatured type II collagen from chicken sternum cartilage, a different kind of product from hydrolyzed collagen.
Who was studied
Adults with knee osteoarthritis.
Limits
One maker-linked trial. The pooled review mixes several products, so it does not show that any blend works.
Why researchers looked
Type II is the main collagen of joint cartilage, so type II products were tested in knee osteoarthritis.
Traditional use
Collagen is a protein found in skin, bone, tendon and cartilage. Animal collagen has long been eaten in foods made from skin, bone and connective tissue.
Proposed mechanism Not established
Not established in this abstract. The authors called for studies of how it works.
A proposed mechanism does not show that the effect happens in people.
Safety outcomes did not differ from placebo in the trial.
Skin appearance with products that contain collagen
Mixed findingsTwo 12-week trials of mixed products reported better skin measures than placebo: a chicken cartilage extract (type II collagen with chondroitin and hyaluronic acid) in 128 women, and a drink with 2.5 g collagen peptides plus vitamin C, zinc, biotin and more in 72 women. Other ingredients may have helped. A 2025 review of single collagen supplements found no skin effect in trials not paid for by drug companies or in higher-quality trials.
4 studiesTwo different branded mixed products; neither is a five-type blend.
Studies, doses and limits
What the trials found
Chicken cartilage extract trial: wrinkles (p = 0.019), elasticity (p = 0.008) and an indirect collagen reading (+12%) improved; skin-surface water did not differ. Drink trial: hydration, elasticity, roughness and density all improved versus placebo and largely held 4 weeks after stopping. Pooled reviews: 26 trials favoured collagen for hydration and elasticity; the 2025 review of 23 trials found the benefit only in industry-funded and lower-quality trials.
Results
Better instrument scores in two mixed-product trials; pooled single-collagen results depend on who paid for the trial.
Effect sizes as reported
Chicken cartilage trial: collagen reading +12%. Pooled reviews: hydration Z = 4.94 and elasticity Z = 4.49 (2023); no effect in non-industry or high-quality trials (2025).
Why this rating
Mixed: the two product trials are positive but cannot credit collagen alone, and the pooled reviews disagree depending on funding and quality.
Form and dose studied
Two different branded mixed products; neither is a five-type blend.
Who was studied
Healthy women aged 35 to 59.
Limits
Multi-ingredient products, instrument measures not lived experience, short trials, and maker involvement. Funding of the chicken cartilage trial is not stated in its abstract.
Why researchers looked
Collagen is a main protein of the deeper skin, and skin changes with age, so mixed products were tested for wrinkles and hydration.
Traditional use
Collagen is a protein found in skin, bone, tendon and cartilage. Animal collagen has long been eaten in foods made from skin, bone and connective tissue.
Proposed mechanism Not established
Not established. Skin collagen was read with instruments, not shown to come from the swallowed collagen.
A proposed mechanism does not show that the effect happens in people.
Both product trials reported good tolerance.
Type V and type X collagen taken by mouth
Not enough evidenceTypes V and X are on labels because they exist in the body. Type V is a minor collagen that works with type I in skin and the cornea. Type X sits in the hardened layer of joint cartilage. No study of people taking either by mouth was found. Type X peptides were found in a lab-treated eggshell membrane product, which shows they can be present, not that they help.
3 studiesNot applicable.
Studies, doses and limits
What the trials found
Tissue studies place type V with type I in skin and cornea, and type X in the calcified layer of joint cartilage. A 2022 laboratory study found type X collagen peptides (963 to 2259 Da) in enzyme-treated eggshell membrane. None of these tested people taking type V or type X.
Results
No human results.
Why this rating
Insufficient: tissue biology and one lab product analysis only; no human study of taking them.
Limits
Biology papers describe where collagens sit. They are not trials of supplements.
Why researchers looked
Labels borrow the list of collagen types found in the body.
Traditional use
Collagen is a protein found in skin, bone, tendon and cartilage. Animal collagen has long been eaten in foods made from skin, bone and connective tissue.
Proposed mechanism Not established
Not established. Tissue location does not show that eating a type feeds that tissue.
A proposed mechanism does not show that the effect happens in people.
Not applicable.
What reaches the blood after eating collagen
Not enough evidenceAfter 9 people ate gelatin or gelatin hydrolysate, small hydroxyproline-containing peptides rose in their blood plasma within one to two hours. This tells us collagen is digested and some pieces are absorbed. It does not show that those pieces reach cartilage or skin or do anything useful.
1 studiesGelatin and gelatin hydrolysates were tested, not blends.
Studies, doses and limits
What the trials found
In a 2022 absorption study of 9 people, Pro-Hyp peaked at 15.5 nmol/mL about 2 hours after gelatin and Hyp-Gly at 2.3 nmol/mL about 1 hour after. Free hydroxyproline absorbed more from the hydrolysates than from plain gelatin.
Results
Peptides measured in blood; no health outcome measured.
Effect sizes as reported
Pro-Hyp peak 15.5 +/- 3.0 nmol/mL.
Why this rating
Insufficient as a benefit: a blood marker in 9 people with gelatin, not a multi-collagen blend.
Form and dose studied
Gelatin and gelatin hydrolysates were tested, not blends.
Who was studied
9 people.
Limits
Very small. Blends were not tested.
Why researchers looked
To check whether swallowed collagen leaves the gut in any form at all.
Traditional use
Collagen is a protein found in skin, bone, tendon and cartilage. Animal collagen has long been eaten in foods made from skin, bone and connective tissue.
Proposed mechanism Preliminary mechanism
Digestion into amino acids and peptides, with some peptides entering the blood.
A proposed mechanism does not show that the effect happens in people.
No safety issues were described in the abstract.
Eggshell membrane, a common blend ingredient, and knee osteoarthritis
Low certaintyEggshell membrane is added to some multi-collagen blends because it contains collagen-like proteins, including type X peptides in one lab study. A 2024 pooled review of five trials found it lowered knee osteoarthritis scores compared with placebo. This is about eggshell membrane alone, not a collagen blend.
2 studiesEggshell membrane supplements of several kinds.
Studies, doses and limits
What the trials found
The 2024 review included seven randomised trials, five pooled: total WOMAC effect size -0.34 (95% CI -0.56 to -0.13) and pain SMD -0.23 (95% CI -0.42 to -0.04) versus placebo.
Results
Small improvement in knee pain and function scores against placebo.
Effect sizes as reported
Total WOMAC -0.34; pain SMD -0.23.
Why this rating
Low: five pooled trials, small effects, authors call for better trials; it is a separate ingredient.
Form and dose studied
Eggshell membrane supplements of several kinds.
Who was studied
Adults with knee osteoarthritis.
Limits
Pools different eggshell membrane products and numbers of people were not given in the abstract.
Why researchers looked
Eggshell membrane contains collagen-like proteins and sugar chains and is used for joint pain.
Traditional use
Collagen is a protein found in skin, bone, tendon and cartilage. Animal collagen has long been eaten in foods made from skin, bone and connective tissue.
Proposed mechanism Preliminary mechanism
Not established. The lab study found collagen peptides and sugar chains in treated membrane, not an effect in people.
A proposed mechanism does not show that the effect happens in people.
No safety problem noted in the abstract; see the Safety tab for egg allergy.
Connections to the rest of health
How Multi-Collagen Blends (Types I, II, III, V and X) 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 |
|---|---|---|---|---|
| Joint Support | Not enough evidence | The five-type blend itself (types I, II, III, V and X together): No trial of a product that combines all five collagen types was found. The trials that exist tested other mixes or single ingredients, so a five-type label has no result of its own. | ||
| Healthy Skin | Not enough evidence | The five-type blend itself (types I, II, III, V and X together): No trial of a product that combines all five collagen types was found. The trials that exist tested other mixes or single ingredients, so a five-type label has no result of its own. | ||
| Joint Support | Very low certainty | Meniscus and knee joint symptoms (type I, II and III blend): One small trial gave 32 adults with meniscus problems a branded product with type I and III collagen peptides plus type II hydrolyzed collagen for 8 weeks. Pain, quality of life, fear of movement and foot function scores were better than placebo. Many other tests, such as balance and several walking tests, did not differ. Chicken type II collagen (undenatured) and knee osteoarthritis symptoms: Chicken-derived type II collagen is a common ingredient in blends. In one 180-day trial of 191 adults with knee osteoarthritis, a product of undenatured type II collagen lowered total joint symptom scores more than placebo and more than a glucosamine-chondroitin comparison. It is one ingredient, not a blend, and two authors work for its maker. | 7 13 11 | |
| Mobility Support | Very low certainty | Meniscus and knee joint symptoms (type I, II and III blend): One small trial gave 32 adults with meniscus problems a branded product with type I and III collagen peptides plus type II hydrolyzed collagen for 8 weeks. Pain, quality of life, fear of movement and foot function scores were better than placebo. Many other tests, such as balance and several walking tests, did not differ. Chicken type II collagen (undenatured) and knee osteoarthritis symptoms: Chicken-derived type II collagen is a common ingredient in blends. In one 180-day trial of 191 adults with knee osteoarthritis, a product of undenatured type II collagen lowered total joint symptom scores more than placebo and more than a glucosamine-chondroitin comparison. It is one ingredient, not a blend, and two authors work for its maker. | 7 13 11 | |
| Healthy Skin | Mixed findings | Skin appearance with products that contain collagen: Two 12-week trials of mixed products reported better skin measures than placebo: a chicken cartilage extract (type II collagen with chondroitin and hyaluronic acid) in 128 women, and a drink with 2.5 g collagen peptides plus vitamin C, zinc, biotin and more in 72 women. Other ingredients may have helped. A 2025 review of single collagen supplements found no skin effect in trials not paid for by drug companies or in higher-quality trials. | 17 2 15 16 | |
| Anti Aging Support | Mixed findings | Skin appearance with products that contain collagen: Two 12-week trials of mixed products reported better skin measures than placebo: a chicken cartilage extract (type II collagen with chondroitin and hyaluronic acid) in 128 women, and a drink with 2.5 g collagen peptides plus vitamin C, zinc, biotin and more in 72 women. Other ingredients may have helped. A 2025 review of single collagen supplements found no skin effect in trials not paid for by drug companies or in higher-quality trials. | 17 2 15 16 | |
| Joint Support | Biological association | Not enough evidence | Type V and type X collagen taken by mouth: Types V and X are on labels because they exist in the body. Type V is a minor collagen that works with type I in skin and the cornea. Type X sits in the hardened layer of joint cartilage. No study of people taking either by mouth was found. Type X peptides were found in a lab-treated eggshell membrane product, which shows they can be present, not that they help. | 19 14 12 |
| Joint Support | Not enough evidence | What reaches the blood after eating collagen: After 9 people ate gelatin or gelatin hydrolysate, small hydroxyproline-containing peptides rose in their blood plasma within one to two hours. This tells us collagen is digested and some pieces are absorbed. It does not show that those pieces reach cartilage or skin or do anything useful. | 8 | |
| Joint Support | Low certainty | Eggshell membrane, a common blend ingredient, and knee osteoarthritis: Eggshell membrane is added to some multi-collagen blends because it contains collagen-like proteins, including type X peptides in one lab study. A 2024 pooled review of five trials found it lowered knee osteoarthritis scores compared with placebo. This is about eggshell membrane alone, not a collagen blend. | 6 12 | |
| Mobility Support | Low certainty | Eggshell membrane, a common blend ingredient, and knee osteoarthritis: Eggshell membrane is added to some multi-collagen blends because it contains collagen-like proteins, including type X peptides in one lab study. A 2024 pooled review of five trials found it lowered knee osteoarthritis scores compared with placebo. This is about eggshell membrane alone, not a collagen blend. | 6 12 |
B. Body systems
| Connected to | Kind of connection | Evidence status | Context | Studies |
|---|---|---|---|---|
| Bones Joints Muscles | Biological association | Not enough evidence | Studied for: The five-type blend itself (types I, II, III, V and X together) Studied for: Meniscus and knee joint symptoms (type I, II and III blend) | 7 13 11 19 14 12 8 6 |
| Skin Hair Beauty | Biological association | Not enough evidence | Studied for: The five-type blend itself (types I, II, III, V and X together) Studied for: Skin appearance with products that contain collagen | 17 2 15 16 19 14 12 |
| Musculoskeletal System | Biological association | Very low certainty | Studied for: Meniscus and knee joint symptoms (type I, II and III blend) Studied for: Chicken type II collagen (undenatured) and knee osteoarthritis symptoms | 7 13 11 6 12 |
| Integumentary System | Biological association | Mixed findings | Studied for: Skin appearance with products that contain collagen | 17 2 15 16 |
| Digestive System | Biological association | Not enough evidence | Studied for: What reaches the blood after eating collagen | 8 |
E. Health conditions
| Connected to | Kind of connection | Evidence status | Context | Studies |
|---|---|---|---|---|
| Fish allergy | Adverse effect or risk | Case report | Fish collagen can trigger severe reactions in people with fish allergy. Fish collagen in a blend can trigger severe reactions in people with fish allergy. Preparation or compound: Fish-derived collagen in a blend |
18 10 |
I. Biomarkers
| Connected to | Kind of connection | Evidence status | Context | Studies |
|---|---|---|---|---|
| Knee pain and function scores (WOMAC, VAS) | Biological association | Low certainty | Measured in trials: lower pain scores with collagen in small trials. A lab change is not the same as a health benefit. | 7 13 |
| Skin hydration and elasticity | Biological association | Mixed findings | Measured in trials: better in industry-linked and lower-quality trials; no effect in the rest of single-collagen trials. A lab change is not the same as a health benefit. | 2 17 15 16 |
| Hydroxyproline peptides in blood plasma | Biological association | Not enough evidence | Measured in trials: rises after gelatin or hydrolysate. A lab change is not the same as a health benefit. | 8 |
K. Biological pathways
L. Active compounds
| Connected to | Kind of connection | Evidence status | Context | Studies |
|---|---|---|---|---|
| Type I collagen | Biological association | Tissue biology | Main scaffold of fibrous cartilage; works with type V in skin dermis. | 19 14 |
| Type II collagen | Biological association | Human trial (undenatured and hydrolyzed forms) | Main scaffold of hyaline and elastic cartilage; chicken cartilage is a common source in products. | 19 13 17 |
| Type III collagen | Biological association | Human trial (inside one blend) | A minor collagen found in all cartilage subtypes studied; in the meniscus trial it was combined with type I. | 19 7 |
| Type V collagen | Biological association | Tissue biology | Minor collagen that co-assembles with type I in cornea and skin; lack of it is linked to classic Ehlers-Danlos syndrome. | 14 |
| Type X collagen | Biological association | Laboratory | Found in the calcified layer of joint cartilage; not tested by mouth in people. | 19 12 |
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 Multi-Collagen Blends (Types I, II, III, V and X). 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 re-read the PubMed abstract of every trial, review, case report and lab study cited. Only abstracts were read. Official fact-sheet pages from NIH ODS and NCCIH could not be read and are marked unverified.
Study library: every study we checked 19
| Study | Design | People | Product, dose, length | Result |
|---|---|---|---|---|
| Al Hajj 2024 Hydrolyzed collagen: Exploring its applications in the food and beverage industries and assessing its impact on human health - A comprehensive review. Heliyon · PMID 39253251 · DOI |
Narrative review review |
Narrative review of hydrolyzed collagen | Hydrolyzed collagen Review |
Hydrolyzed collagen is made of small chains of about 3 to 6 kDa. It can be made from bovine, porcine, marine, chicken and fish sources, and is mostly glycine, proline and hydroxyproline. Not given in the abstract (Not given in the abstract) Methods, limits and fundingOutcomes: Sources, production and uses of hydrolyzed collagen Limitations: A narrative review, not a systematic one; its health claims were not used on this page. Funding and conflicts: Authors declare no competing financial interests. Read: abstract |
| Bolke 2019 A Collagen Supplement Improves Skin Hydration, Elasticity, Roughness, and Density: Results of a Randomized, Placebo-Controlled, Blind Study. Nutrients · PMID 31627309 · DOI |
Randomised controlled trial |
72 72 healthy women aged 35 or older (36 supplement, 36 placebo) |
Branded drink ampoule: 2.5 g collagen peptides with acerola extract, vitamin C, zinc, biotin and a vitamin E complex Drinkable ampoule 2.5 g collagen peptides in each ampoule (studied in the trial) 12 weeks, plus 4 weeks follow-up for the supplement group · vs Placebo |
Hydration, elasticity, roughness and density were all better than placebo (statistically significant for every measure), and the effects were largely kept during the 4 weeks after stopping. Women's own ratings agreed. The drink was well tolerated. Not given in the abstract (Not given in the abstract) Methods, limits and fundingOutcomes: Skin hydration, elasticity, roughness and density (instrument measures) Limitations: A multi-ingredient drink, so collagen cannot be credited alone. The abstract gives no effect sizes. A sponsor is mentioned (the maker of the drink). Funding and conflicts: Authors declare no conflict of interest; the sponsor is said to have had no influence on conduct, analysis or interpretation. Read: abstract |
| Cammilleri 2025 Toxic metals and metalloids in collagen supplements of fish and jellyfish origin: Risk assessment for daily intake. Open Med (Wars) · PMID 40292256 · DOI |
Laboratory product analysis product samples |
Marine collagen supplement brands of fish and jellyfish origin (number of samples not given in the abstract) | Marine collagen supplements Product samples · vs EU limits and tolerable daily intakes |
Arsenic was highest (mean 0.59 +/- 0.28 mg/kg), then lead (0.13 +/- 0.02 mg/kg), with large differences between brands. Mercury was found in 12% of samples. Jellyfish and one mackerel-skin product had no detectable metals. None exceeded EU limits, and estimated daily intakes were below tolerable daily intakes. The authors suggest updating rules for cumulative risk. Arsenic 0.59 mg/kg mean; lead 0.13 mg/kg mean (Not given in the abstract) Methods, limits and fundingOutcomes: Lead, cadmium, chromium, arsenic and mercury Limitations: Marine products only. Bovine, chicken and multi-collagen blends were not tested. Funding and conflicts: One author is editor-in-chief of the journal; no other conflict declared. Read: abstract |
| Chen 2026 Heavy metal and Microplastic exposure from sports protein Supplements: Integrated health risk modeling and scenario analysis. Environ Res · PMID 41655677 · DOI |
Laboratory product analysis product samples |
30 30 sports protein supplements sold in China (one of them a collagen product) |
Sports protein powders (mostly plant or dairy; one collagen sample) Product samples |
Every sample had at least one of the four metals, and microplastic particles were found in all (2 to 19 per 30 g serving). Mercury was below 0.01 mg/kg in nearly all, except one collagen sample at 0.02 mg/kg. The modelled health risk index stayed below 1 at 30 g a day and was 0.90 at 90 g a day. One collagen sample: mercury 0.02 mg/kg (Not given in the abstract) Methods, limits and fundingOutcomes: Arsenic, cadmium, lead, mercury and microplastic particles Limitations: Only one collagen sample among 30 protein products, so it says little about collagen blends. Funding and conflicts: Authors declare no competing interests. Read: abstract |
| Deshmukh 2016 Enigmatic insight into collagen. J Oral Maxillofac Pathol · PMID 27601823 · DOI |
Narrative review review |
General review of collagen | Not a supplement review Review |
Collagen is the most abundant protein in the body (about 30% of dry weight) and forms the fibres of skin, tendon, bone, cartilage and other connective tissue. The body has at least 16 types, the most prominent being I, II and III. Not given in the abstract (Not given in the abstract) Methods, limits and fundingOutcomes: What collagen is and where it sits Limitations: A general background review; no supplement evidence. Funding and conflicts: No conflict statement in the record read. Read: abstract |
| García-Muñoz 2024 Efficacy of Eggshell Membrane in Knee Osteoarthritis: A Systematic Review and Meta-Analysis. Nutrients · PMID 39203777 · DOI |
Systematic review meta analysis |
Seven randomised trials in knee osteoarthritis (five in the meta-analysis) | Eggshell membrane supplements Oral Varied by trial Varied · vs Placebo |
Eggshell membrane lowered the total WOMAC score (effect size -0.34) and the WOMAC pain score (SMD -0.23) compared with placebo. The authors call it a promising add-on and say better trials are needed. Total WOMAC -0.34; pain SMD -0.23 (Total WOMAC -0.56 to -0.13; pain -0.42 to -0.04) Methods, limits and fundingOutcomes: WOMAC, VAS pain and KOOS scores Limitations: Only five trials pooled; the abstract gives no number of participants. This is about eggshell membrane alone, not a collagen blend. Funding and conflicts: Authors declare no conflicts of interest. Read: abstract |
| Genç 2025 The effect of supplementation with type I and type III collagen peptide and type II hydrolyzed collagen on pain, quality of life and physical function in patients with meniscopathy: a randomized, double-blind, placebo-controlled study. BMC Musculoskelet Disord · PMID 39755603 · DOI |
Randomised controlled trial |
32 32 adults with meniscopathy (17 collagen, 15 placebo) |
One branded blend of type I and type III collagen peptides plus type II hydrolyzed collagen Oral supplement Not given in the abstract (studied in the trial) 8 weeks · vs Placebo |
Pain, quality of life, fear of movement and foot function scores were better with collagen than placebo (p < 0.05). Leg strength differed by p = 0.057, which the abstract calls significant but is above the usual 0.05 line. Back strength, joint position sense, balance and several walking and stair tests did not differ. Not given in the abstract (Not given in the abstract) Methods, limits and fundingOutcomes: Pain (VAS), WOMAC, KOOS-PS, quality of life, kinesiophobia, foot function, leg and back strength, balance and walking tests Limitations: Only 32 people and eight weeks. Many outcomes were tested, so some chance findings are likely. It was registered after the trial was done (14 May 2024). One product, so it says nothing about blends in general. Funding and conflicts: Authors declare no competing interests. Registration: IRCT20240411061470N2 (registered retrospectively) Read: abstract |
| Iwasaki 2022 Comparison of gelatin and low-molecular weight gelatin hydrolysate ingestion on hydroxyproline (Hyp), Pro-Hyp and Hyp-Gly concentrations in human blood. Food Chem · PMID 34461513 · DOI |
Human absorption study |
9 9 people (abstract does not say how healthy) |
Gelatin, gelatin hydrolysate and low-molecular-weight gelatin hydrolysate (not a multi-collagen product) Oral Not given in the abstract Blood sampled for hours after one serving · vs Gelatin versus hydrolysates |
After gelatin, the peptides Pro-Hyp (peak 15.5 +/- 3.0 nmol/mL at 2 hours) and Hyp-Gly (peak 2.3 +/- 0.5 nmol/mL at 1 hour) rose in plasma. Free hydroxyproline absorbed less from gelatin than from the hydrolysates. Pro-Hyp peak 15.5 +/- 3.0 nmol/mL (Not given in the abstract) Methods, limits and fundingOutcomes: Plasma hydroxyproline and the peptides Pro-Hyp and Hyp-Gly Limitations: Nine people; a blood marker only, with no health outcome. Gelatin is not the same as a multi-collagen blend. Funding and conflicts: No conflict statement in the record read. Read: abstract |
| Knight 2006 Hydroxyproline ingestion and urinary oxalate and glycolate excretion. Kidney Int · PMID 17021603 · DOI |
Controlled human study |
Volunteers (number and health status not given in the abstract) | Gelatin versus whey protein Oral 30 g gelatin or whey on a controlled diet; 1, 2, 5 and 10 g gelatin loads (studied in the trial) Controlled diet periods · vs Whey protein |
On 30 g of gelatin, urinary glycolate was 5.3 times higher and oxalate 43% higher than on whey. Changes were seen with 5 g and 10 g gelatin loads but not with 1 g or 2 g. The authors estimate hydroxyproline accounts for part of the oxalate the body makes. Glycolate x5.3; oxalate +43% vs whey (Not given in the abstract) Methods, limits and fundingOutcomes: Urine oxalate and glycolate; plasma hydroxyproline Limitations: Gelatin, not a collagen blend. Kidney stones were not measured, only urine markers. Funding and conflicts: No conflict statement in the abstract. Read: abstract |
| Kobayashi 2016 Fish collagen is an important panallergen in the Japanese population. Allergy · PMID 26785247 · DOI |
Laboratory blood study human samples |
Japanese people with fish allergy (number not given in the abstract) | Mackerel collagen tested against patients' blood Laboratory test |
50% of Japanese patients with fish allergy had IgE to mackerel collagen and 44% to mackerel parvalbumin. Mackerel collagen cross-reacted strongly with 22 fish species (inhibition 87 to 98%), and triggered IgE cross-linking on mast cells in a lab test. 50% had IgE to fish collagen (Not given in the abstract) Methods, limits and fundingOutcomes: IgE antibodies to fish collagen and parvalbumin; cross-reactivity across fish Limitations: A blood and lab test in one country; it shows sensitisation, which is not always the same as a clinical reaction. Funding and conflicts: No conflict statement in the record read. Read: abstract |
| Liang 2024 Efficacy and safety of collagen derivatives for osteoarthritis: A trial sequential meta-analysis. Osteoarthritis Cartilage · PMID 38218227 · DOI |
Systematic review meta analysis |
3165 35 randomised trials in people with osteoarthritis (25 trials, 2,856 people, in the main analysis) |
Collagen derivatives (hydrolyzed collagen, gelatin, undenatured type II collagen and others, grouped together) Oral Varied by trial Varied · vs Placebo or control |
Small-to-moderate improvement in pain and function versus control. Collagen derivatives did not raise withdrawals or side effects. Pain SMD -0.35; function SMD -0.31 (Pain -0.48 to -0.22 (moderate certainty); function -0.41 to -0.22 (high certainty)) Methods, limits and fundingOutcomes: Pain and function scores; withdrawals; adverse events Limitations: Groups different collagen products together, so the result is not specific to any one product or to blends. Pain is self-reported. Funding and conflicts: No conflict statement in the record read. Read: abstract |
| Lien 2022 High-efficiency decomposition of eggshell membrane by a keratinase from Meiothermus taiwanensis. Sci Rep · PMID 36038640 · DOI |
Laboratory study laboratory |
Laboratory processing of eggshell membrane (no people or animals) | Enzyme-treated eggshell membrane hydrolysate Laboratory sample |
The enzyme-treated eggshell membrane contained type X collagen peptides of 963 to 2259 Da, plus glycosaminoglycans (6.4%, of which 0.7% sulfated). Part of the sugar-chain fraction stimulated immune signals (IL-6 and TNF-alpha) in the lab. Not given in the abstract (Not given in the abstract) Methods, limits and fundingOutcomes: Amino acids, collagen peptides and sugar-chain content of the hydrolysate Limitations: A laboratory process study. It shows the peptides exist in the product; it shows nothing about what happens in the body. Funding and conflicts: Authors declare no competing interests; two authors are from a food company (I-MEI Foods). Read: abstract |
| Lugo 2016 Efficacy and tolerability of an undenatured type II collagen supplement in modulating knee osteoarthritis symptoms: a multicenter randomized, double-blind, placebo-controlled study. Nutr J · PMID 26822714 · DOI |
Randomised controlled trial |
191 191 adults with knee osteoarthritis |
Undenatured type II collagen from chicken sternum cartilage (branded UC-II) Oral supplement 40 mg a day (studied in the trial) 180 days · vs Placebo, and glucosamine hydrochloride plus chondroitin sulfate |
At day 180 the UC-II group had a larger fall in total WOMAC score than placebo (p = 0.002) and than glucosamine-chondroitin (p = 0.04). Pain and stiffness (both comparisons) and physical function (vs placebo) also improved more. Safety outcomes did not differ between groups. Total WOMAC: p = 0.002 vs placebo; p = 0.04 vs glucosamine-chondroitin (Not given in the abstract) Methods, limits and fundingOutcomes: Total WOMAC score; Lequesne index; pain scale; WOMAC pain, stiffness and function Limitations: One ingredient from one maker, not a multi-collagen blend. Points gained were not given in the abstract. Funding and conflicts: Two authors work for the maker of the product (InterHealth Nutraceuticals); industry-linked. Registration: CTRI/2013/05/003663; CTRI/2013/02/003348 Read: abstract |
| Mak 2016 Type V Collagen in Health, Disease, and Fibrosis. Anat Rec (Hoboken) · PMID 26910848 · DOI |
Narrative review review |
Review of tissue and disease biology | Not a supplement review Review |
Type V collagen is a minor collagen that co-assembles with type I into fibrils in the cornea and skin dermis. Missing type V is linked to loss of corneal clarity and classic Ehlers-Danlos syndrome; extra type V is found in fibrosis of several organs. Not given in the abstract (Not given in the abstract) Methods, limits and fundingOutcomes: Role of type V collagen in tissues and disease Limitations: A biology review. It does not cover taking type V by mouth. Funding and conflicts: No conflict statement in the record read. Read: abstract |
| Myung 2025 Effects of Collagen Supplements on Skin Aging: A Systematic Review and Meta-Analysis of Randomized Controlled Trials. Am J Med · PMID 40324552 · DOI |
Systematic review meta analysis |
1474 23 randomised trials, 1,474 people |
Collagen supplements of many kinds, grouped together Oral Varied by trial Varied · vs Placebo |
Across all 23 trials, collagen improved hydration, elasticity and wrinkles. But trials not paid for by drug companies showed no effect, and high-quality trials showed no significant effect in any category. The authors conclude there is currently no clinical evidence to support collagen supplements to prevent or treat skin ageing. Pooled benefit disappears in non-industry-funded and high-quality trials (Not given in the abstract) Methods, limits and fundingOutcomes: Skin hydration, elasticity, wrinkles Limitations: Pools many products; it did not look at five-type blends specifically. Only the abstract was read, so subgroup numbers are not given here. Funding and conflicts: No conflict statement in the record read. Read: abstract |
| Pu 2023 Effects of Oral Collagen for Skin Anti-Aging: A Systematic Review and Meta-Analysis. Nutrients · PMID 37432180 · DOI |
Systematic review meta analysis |
1721 26 randomised trials, 1,721 people |
Hydrolyzed collagen, grouped together Oral Varied by trial Varied · vs Placebo |
Hydrolyzed collagen improved skin hydration (Z = 4.94, p < 0.00001) and elasticity (Z = 4.49, p < 0.00001) versus placebo. Hydration effects varied with the collagen source and length of use. The authors found several biases in the included trials. Hydration Z = 4.94; elasticity Z = 4.49 (Not given in the abstract) Methods, limits and fundingOutcomes: Skin hydration and elasticity Limitations: The authors report biases in the trials. Funding of the individual trials is not discussed in the abstract. Funding and conflicts: Authors declare no conflict of interest. Read: abstract |
| Schwartz 2019 Novel Hydrolyzed Chicken Sternal Cartilage Extract Improves Facial Epidermis and Connective Tissue in Healthy Adult Females: A Randomized, Double-Blind, Placebo-Controlled Trial. Altern Ther Health Med · PMID 31221944 |
Randomised controlled trial |
128 128 healthy women aged 39 to 59 (113 finished) |
Branded chicken sternal cartilage extract: hydrolyzed type II collagen with chondroitin sulfate and hyaluronic acid Oral supplement 500 mg twice a day (studied in the trial) 12 weeks · vs Placebo |
Compared with placebo, the extract reduced facial lines and wrinkles (p = 0.019) and crow's feet (p = 0.05), raised elasticity (p = 0.008) and the indirect skin collagen measure by 12% (p < 0.001). Skin-surface water content did not differ. No adverse reactions were reported. Skin collagen measure +12%; lines and wrinkles p = 0.019 (Not given in the abstract) Methods, limits and fundingOutcomes: Facial lines and wrinkles, elasticity, skin collagen content (indirect), skin water content, dryness, redness, tolerance Limitations: One branded mix of three ingredients, so collagen cannot be credited alone. Skin collagen was an indirect instrument reading. Dropouts: 15 of 128. Funding and conflicts: Funding and conflicts not stated in the abstract. Read: abstract |
| Ueno 2020 A case of pediatric anaphylaxis caused by gummy tablets containing fish collagen. Asia Pac Allergy · PMID 33178560 · DOI |
Case report |
1 A 9-year-old girl with fish allergy |
Fruit-flavoured gummy tablets made with fish collagen Gummy tablets 2 tablets Single episode |
After eating 2 gummy tablets she had anaphylaxis. The maker confirmed fish collagen was used, and an oral fish collagen challenge reproduced the reaction. A 120-kDa protein was identified as fish collagen. The authors say processed foods may contain fish collagen. Not given in the abstract (Not given in the abstract) Methods, limits and fundingOutcomes: Anaphylaxis; oral challenge; immunoblot and mass spectrometry Limitations: A single case. It shows fish collagen can cause anaphylaxis; it says nothing about how common this is. Funding and conflicts: Authors have no financial conflicts of interest. Read: abstract |
| Wachsmuth 2006 Immunolocalization of matrix proteins in different human cartilage subtypes. Histol Histopathol · PMID 16493578 · DOI |
Laboratory tissue study human tissue |
Human cartilage from autopsy and biopsy samples (joint, spine disc, windpipe, epiglottis, ear, nose) | Not a supplement (tissue staining) Tissue samples |
Type I is a major scaffold of fibrous cartilage and type II of hyaline and elastic cartilage. Type X was found in the calcified layer of joint cartilage, the inner part of tracheal clips and epiglottis cartilage. Types III, V and VI were found in all cartilage subtypes; type IV in none. Not given in the abstract (Not given in the abstract) Methods, limits and fundingOutcomes: Which collagen types sit in which cartilage Limitations: Describes where types sit in tissue. It does not show that eating a type feeds that tissue. Funding and conflicts: No conflict statement in the record read. Read: abstract |
What we do not know yet
- No trial of a five-type (I, II, III, V, X) collagen blend was found.
- No study of taking type V or type X collagen by mouth was found.
- Independent, long and large trials of any multi-collagen product are missing.
- NIH ODS and NCCIH collagen pages could not be read.
- No interaction, pregnancy, breastfeeding or children safety data were found for blends.
- Collagen amounts in foods were not read.
- Metal levels and label accuracy of multi-collagen blends were not researched.
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 3
Knee pain and function scores (WOMAC, VAS)
Lower pain scores with collagen in small trials in trials
Questionnaires and a pain scale where people rate pain, stiffness and how well the knee works.
Low certaintyResults and what it means
Why it was measured
To see whether collagen products change how the knee feels and works.
Statistical vs. clinical meaning
Self-rated scores can be influenced by expectation; both trials are small or maker-linked.
Safety implication
No safety difference from placebo in the trial that reported it.
| Study | Result | People | Product |
|---|---|---|---|
| 7 | Pain and quality of life scores better than placebo (p < 0.05); leg strength p = 0.057 | 32 adults with meniscopathy | Type I, II and III collagen blend, 8 weeks |
| 13 | Total WOMAC lower than placebo (p = 0.002) and glucosamine-chondroitin (p = 0.04) | 191 adults with knee osteoarthritis | Undenatured type II collagen, 180 days |
Skin hydration and elasticity
Better in industry-linked and lower-quality trials; no effect in the rest of single-collagen trials in trials
Hydration is how much water the outer skin holds. Elasticity is how well skin springs back after being stretched.
Mixed findingsResults and what it means
Why it was measured
To see whether mixed collagen products change how skin behaves.
Statistical vs. clinical meaning
Mixed and dependent on who funded the trial.
Safety implication
Products were well tolerated in the two product trials.
| Study | Result | People | Product |
|---|---|---|---|
| 2 | Hydration, elasticity, roughness and density better than placebo | 72 women aged 35 or older | Drink with 2.5 g collagen peptides plus vitamins and minerals, 12 weeks |
| 17 | Elasticity improved (p = 0.008); skin-surface water did not differ | 128 women aged 39 to 59 | Chicken cartilage extract with type II collagen, chondroitin and hyaluronic acid, 12 weeks |
| 15 | No effect in trials not funded by drug companies or in high-quality trials | 23 trials, 1,474 people | Collagen supplements of many kinds |
Hydroxyproline peptides in blood plasma
Rises after gelatin or hydrolysate in trials
Hydroxyproline is an amino acid found almost only in collagen. Pro-Hyp and Hyp-Gly are small pieces made of it that can be measured in blood after eating gelatin or collagen.
Not enough evidenceResults and what it means
Why it was measured
To see whether eaten collagen is absorbed.
Statistical vs. clinical meaning
Shows absorption of pieces, not a health benefit.
Safety implication
None reported.
| Study | Result | People | Product |
|---|---|---|---|
| 8 | Pro-Hyp peak 15.5 +/- 3.0 nmol/mL at 2 hours; Hyp-Gly peak 2.3 +/- 0.5 nmol/mL at 1 hour | 9 people | Gelatin, with hydrolysate comparison |
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 4
- A blend can stack several allergens: fish, beef, chicken and egg. A multi-collagen product can mix collagen from more than one animal, so it can carry the allergens of each. Fish collagen is the best documented: in Japan, half of the people with fish allergy had antibodies to fish collagen, and a 9-year-old with fish allergy had anaphylaxis after two gummy tablets made with fish collagen. For beef, chicken and egg sources, no case report of a reaction to an oral collagen supplement was found in the sources read; that is not proof they are safe for allergic people. Case report and laboratory study 18 10
- Read the whole label: the source animals may not be all listed clearly. Fish collagen was found in a processed gummy that the family only learned about by contacting the maker. Processed foods and supplements can contain fish collagen without obvious wording. Case report 18
- Metals and other contaminants vary by brand. A 2025 lab study of marine collagen supplements found arsenic and lead in many samples with large differences between brands; none passed EU limits. A 2026 study of 30 sports protein supplements found at least one toxic metal and microplastic particles in every sample, including one collagen sample with a little mercury. Multi-collagen blends were not tested in either study. Laboratory analysis 3 4
- Collagen and gelatin contain hydroxyproline, which the body can turn into oxalate. In a controlled study, 30 g of gelatin raised urine oxalate by 43% and glycolate 5.3-fold compared with whey protein. Kidney stones were not measured, so this is a question for people with a history of kidney stones, not a finding about harm from blends. Controlled human study (urine marker) 9
Side effects 5
| Effect | How often | Severity and recovery | Evidence |
|---|---|---|---|
| No extra side effects or withdrawals in a 35-trial review of collagen products This review groups several kinds of collagen, not blends. Mild stomach upset or taste complaints were not detailed in the abstract. | Not different from control | Not applicable Not applicable | Meta-analysis 11 |
| No adverse reactions reported with chicken cartilage collagen extract for 12 weeks Short trial of one product. | None reported in 113 women who finished | Not applicable Not applicable | Randomised trial 17 |
| Safety outcomes did not differ from placebo or glucosamine-chondroitin with undenatured type II collagen for 180 days Maker-linked trial of one ingredient. | Not given in the abstract | Not applicable Not applicable | Randomised trial 13 |
| Drink with collagen peptides and vitamins was well tolerated for 12 weeks Multi-ingredient drink. | Not given in the abstract | Not applicable Not applicable | Randomised trial 2 |
| Side effects of the 8-week meniscus blend trial were not described in the abstract Absence in an abstract is not absence of effects. | Not given | Not applicable Not applicable | Randomised trial 7 |
Liver
No liver injury linked to collagen blends was found in the sources read. A liver-safety reference (LiverTox) was not opened.
How often. No frequency was found.
Monitoring. No agency monitoring advice was found.
This is a safety connection. It is not evidence that Multi-Collagen Blends (Types I, II, III, V and X) supports liver health.
Medicines and supplements 3
| With | Why it matters | Importance | Evidence | What to do |
|---|---|---|---|---|
| Prescription medicines (general) prescription | No mechanism found. | No interaction study between collagen blends 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 a doctor or pharmacist about all supplements. |
| Biotin added to a blend (blood test results) supplement | Some blends add biotin. Biotin is known to interfere with some lab tests; this was not checked against a source for this page. | Not verified here. | Not verified Not enough evidence 2 | Tell the person ordering your blood tests which supplements you take, including biotin. Ask a pharmacist. |
| Vitamin C, zinc and other added ingredients supplement | Blends and drinks often add other nutrients. | No harmful combination was reported in the trials read; those trials were short. | Randomised trial Not enough evidence 2 17 | Check the label for added ingredients and ask a pharmacist. |
Who should check first 6
| Situation | Advice | Evidence |
|---|---|---|
| Fish allergy | Avoid fish-derived collagen unless an allergist says otherwise. Check the label for marine or fish sources, including in gummies. | Case report and laboratory study 18 10 |
| Allergy to beef, chicken or egg | Check which animal sources are in the blend, including eggshell membrane and chicken cartilage, and ask an allergist. No oral supplement reaction report was found in the sources read. | Absence of evidence |
| Pregnancy and breastfeeding | No safety study of collagen blends in pregnancy or breastfeeding was found in the sources read. Ask a doctor or midwife before using one. | Absence of evidence |
| Children | No trial safety data in children were found, apart from the fish-allergy case. Ask a doctor before giving a child a blend. | Absence of evidence and case report 18 |
| History of kidney stones or kidney disease | Ask a doctor. Gelatin raised urine oxalate in one study; effects of blends on kidney stones were not studied. | Controlled human study 9 |
| Liver conditions | No liver safety data on collagen blends were found. Ask a doctor or pharmacist. | Absence of evidence |
Overdose, product quality and regulators
Summary. No poisoning or overdose reports for collagen blends were found in the sources read.
Animal. Not reviewed.
High dose or long term signals. Long-term safety beyond about 6 months in trials was not found; the longest trial read was 180 days.
Overdose response. Not found.
Genotoxicity. Not researched.
Product quality depends on the raw material and the maker. The two lab studies read tested marine collagen and sports protein products, not multi-collagen blends. Label accuracy of five-type claims was not researched.
Metals in marine collagen. Arsenic highest (average 0.59 mg/kg), lead 0.13 mg/kg; mercury in 12% of samples; jellyfish and one mackerel-skin product had none detectable; none passed EU limits. 3
Metals and microplastics in sports protein products. All 30 products had at least one metal and microplastic particles; one collagen sample had mercury at 0.02 mg/kg. 4
| Body | Action | Date |
|---|
When to get medical help
- Swelling of the face, lips or tongue, hives, wheezing, throat tightness, trouble swallowing or trouble breathing after taking a collagen product. In the US call 911; elsewhere call your local emergency number.
- Vomiting, dizziness or fainting soon after taking a product containing fish, egg, beef or chicken ingredients you are allergic to.
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 multi-collagen blend?
Is there proof that five collagen types work better than one?
No. No trial of a five-type blend was found. The trials that exist tested one named product, such as a type I, II and III mix, or a single ingredient.
Do multi-collagen blends help knee or joint pain?
Evidence is thin. One small 8-week trial of 32 adults with meniscus problems found less pain than placebo with a type I, II and III product, but many other tests did not differ. A large review found small gains for collagen products in osteoarthritis, but it pooled different collagens, not blends.
Do multi-collagen blends help skin?
What does type V collagen do in a supplement?
In the body it works with type I in skin and the cornea. Taking it by mouth was not studied in the sources read, so there is no evidence it does anything useful as a supplement.
Is type X collagen useful in a supplement?
Does eating collagen feed my cartilage or skin?
This is not shown. After gelatin, small collagen pieces appear in the blood within one to two hours, but that is a blood marker, not a health benefit.
Can a multi-collagen blend cause an allergic reaction?
Are multi-collagen blends safe in pregnancy or for children?
No safety data for blends in pregnancy, breastfeeding or children were found in the sources read. Ask a doctor or pharmacist first.
Can blends contain heavy metals?
Could collagen affect kidney stones?
Collagen and gelatin contain hydroxyproline, which the body can turn into oxalate. Gelatin raised urine oxalate in a controlled study. Stones were not measured, so this is a question, not a finding. Ask a doctor if you have had kidney stones.
How is a blend different from collagen peptides, UC-II or eggshell membrane?
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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 re-read the PubMed abstract of every trial, review, case report and lab study cited. Only abstracts were read. Official fact-sheet pages from NIH ODS and NCCIH could not be read and are marked unverified.
- How we rate evidence
- See "How we rate evidence" in the Evidence tab.
- Independence
- No product is promoted on this page. No affiliate links are shown. One trial was linked to the maker of its product; this is flagged where the abstract shows 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.
- Al Hajj W, Salla M, Krayem M, Khaled S, Hassan HF, El Khatib S. Hydrolyzed collagen: Exploring its applications in the food and beverage industries and assessing its impact on human health - A comprehensive review.. Heliyon. 2024. PMID 39253251. DOI 10.1016/j.heliyon.2024.e36433. (abstract)
- Bolke L, Schlippe G, Gerß J, Voss W. A Collagen Supplement Improves Skin Hydration, Elasticity, Roughness, and Density: Results of a Randomized, Placebo-Controlled, Blind Study.. Nutrients. 2019. PMID 31627309. DOI 10.3390/nu11102494. (abstract)
- Cammilleri G, Tortorici M, Pantano L, Galluzzo FG, Pulvirenti A, Buscemi MD, Lo Dico GM, Macaluso A, Calabrese V, Jacob UM, Ferrantelli V. Toxic metals and metalloids in collagen supplements of fish and jellyfish origin: Risk assessment for daily intake.. Open Med (Wars). 2025. PMID 40292256. DOI 10.1515/med-2025-1141. (abstract)
- Chen M, Dong R, Lai W. Heavy metal and Microplastic exposure from sports protein Supplements: Integrated health risk modeling and scenario analysis.. Environ Res. 2026. PMID 41655677. DOI 10.1016/j.envres.2026.123988. (abstract)
- Deshmukh SN, Dive AM, Moharil R, Munde P. Enigmatic insight into collagen.. J Oral Maxillofac Pathol. 2016. PMID 27601823. DOI 10.4103/0973-029X.185932. (abstract)
- García-Muñoz AM, Abellán-Ruiz MS, García-Guillén AI, Victoria-Montesinos D. Efficacy of Eggshell Membrane in Knee Osteoarthritis: A Systematic Review and Meta-Analysis.. Nutrients. 2024. PMID 39203777. DOI 10.3390/nu16162640. (abstract)
- Genç AS, Yılmaz AK, Anıl B, Korkmaz Salkılıç E, Akdemir E, Güzel B, Mor A, Yarar HA, Güzel N, Kehribar L. The effect of supplementation with type I and type III collagen peptide and type II hydrolyzed collagen on pain, quality of life and physical function in patients with meniscopathy: a randomized, double-blind, placebo-controlled study.. BMC Musculoskelet Disord. 2025. PMID 39755603. DOI 10.1186/s12891-024-08244-w. (abstract)
- Iwasaki Y, Nakatogawa M, Shimizu A, Sato Y, Shigemura Y. Comparison of gelatin and low-molecular weight gelatin hydrolysate ingestion on hydroxyproline (Hyp), Pro-Hyp and Hyp-Gly concentrations in human blood.. Food Chem. 2022. PMID 34461513. DOI 10.1016/j.foodchem.2021.130869. (abstract)
- Knight J, Jiang J, Assimos DG, Holmes RP. Hydroxyproline ingestion and urinary oxalate and glycolate excretion.. Kidney Int. 2006. PMID 17021603. DOI 10.1038/sj.ki.5001906. (abstract)
- Kobayashi Y, Akiyama H, Huge J, Kubota H, Chikazawa S, Satoh T, Miyake T, Uhara H, Okuyama R, Nakagawara R, Aihara M, Hamada-Sato N. Fish collagen is an important panallergen in the Japanese population.. Allergy. 2016. PMID 26785247. DOI 10.1111/all.12836. (abstract)
- Liang CW, Cheng HY, Lee YH, Liao CD, Huang SW. Efficacy and safety of collagen derivatives for osteoarthritis: A trial sequential meta-analysis.. Osteoarthritis Cartilage. 2024. PMID 38218227. DOI 10.1016/j.joca.2023.12.010. (abstract)
- Lien YC, Lai SJ, Lin CY, Wong KP, Chang MS, Wu SH. High-efficiency decomposition of eggshell membrane by a keratinase from Meiothermus taiwanensis.. Sci Rep. 2022. PMID 36038640. DOI 10.1038/s41598-022-18474-4. (abstract)
- Lugo JP, Saiyed ZM, Lane NE. Efficacy and tolerability of an undenatured type II collagen supplement in modulating knee osteoarthritis symptoms: a multicenter randomized, double-blind, placebo-controlled study.. Nutr J. 2016. PMID 26822714. DOI 10.1186/s12937-016-0130-8. (abstract)
- Mak KM, Png CY, Lee DJ. Type V Collagen in Health, Disease, and Fibrosis.. Anat Rec (Hoboken). 2016. PMID 26910848. DOI 10.1002/ar.23330. (abstract)
- Myung SK, Park Y. Effects of Collagen Supplements on Skin Aging: A Systematic Review and Meta-Analysis of Randomized Controlled Trials.. Am J Med. 2025. PMID 40324552. DOI 10.1016/j.amjmed.2025.04.034. (abstract)
- Pu SY, Huang YL, Pu CM, Kang YN, Hoang KD, Chen KH, Chen C. Effects of Oral Collagen for Skin Anti-Aging: A Systematic Review and Meta-Analysis.. Nutrients. 2023. PMID 37432180. DOI 10.3390/nu15092080. (abstract)
- Schwartz SR, Hammon KA, Gafner A, Dahl A, Guttman N, Fong M, Schauss AG. Novel Hydrolyzed Chicken Sternal Cartilage Extract Improves Facial Epidermis and Connective Tissue in Healthy Adult Females: A Randomized, Double-Blind, Placebo-Controlled Trial.. Altern Ther Health Med. 2019. PMID 31221944. (abstract)
- Ueno R, Takaoka Y, Shimojo N, Ohno F, Yamaguchi T, Matsunaga K, Kameda M. A case of pediatric anaphylaxis caused by gummy tablets containing fish collagen.. Asia Pac Allergy. 2020. PMID 33178560. DOI 10.5415/apallergy.2020.10.e35. (abstract)
- Wachsmuth L, Söder S, Fan Z, Finger F, Aigner T. Immunolocalization of matrix proteins in different human cartilage subtypes.. Histol Histopathol. 2006. PMID 16493578. DOI 10.14670/HH-21.477. (abstract)
