What Is Multi-Collagen? Types I to V and What 'Five Types' Adds

A multi-collagen powder blends collagen from several raw materials, usually bovine hide (types I and III), fish skin (type I), chicken cartilage (type II) and eggshell membrane (types V and X), so that one label can list five types. Once collagen is hydrolysed into peptides, the type tells you which animal and tissue the raw material came from, not what the peptides do, and no trial has compared a multi-collagen with a single-source powder.^{1, 2, 3} The skin, joint and bone trials used single-source peptides at 2.5 to 10 g a day, so the figure to compare across tubs is grams of collagen per serving.^{3, 4, 5, 6} Part of the Wellgard collagen guide.

What is in a multi-collagen powder?

Collagen is a family of 28 proteins.⁷ Food law lists the raw materials collagen for food may be made from, among them bones, the hides and skins of farmed ruminants, poultry skin, and fish skin and bones.⁸ A multi-collagen combines several and lists the type each carries. Bovine hide brings type I with type III, present through the whole thickness of cattle skin and highest in young tissue.⁹ Fish skin brings type I.¹⁰ Chicken cartilage is the usual type II source.¹¹ Eggshell membrane, listed for types V and X, is a different kind of ingredient: a cross-linked mesh of 472 identified proteins, collagens among them, whose own trials used 300 to 500 mg of whole membrane.^{12, 13, 14}

Undenatured type II is a separate ingredient: not hydrolysed, given at 40 mg a day in a capsule, and tested alone in its 191-person, 180-day knee trial.¹¹ What type 2 collagen is separates the capsule ingredient from cartilage peptides.

Does "type" still matter once collagen is hydrolysed?

Not in the way a five-type label implies. Hydrolysis uses a food enzyme to cut collagen into short peptides, under 3,000 daltons in one salmon-skin process.¹⁰ The structure that made a molecule "type I" or "type II" does not survive that cut, which is why undenatured type II carries antigenic structures that hydrolysed collagen does not.¹ A supplier-funded 2024 randomised crossover in six healthy adults found comparable uptake of hydroxyproline and its peptides from fish, pig and cattle hydrolysates, the bovine at 2,000 and 5,000 daltons, "independently of source and molecular weight".² A five-type label describes the raw materials that went into the tub, not five sets of results. What collagen peptides are explains the enzyme step.

Has any trial compared multi-collagen with single-source collagen?

No. A 2023 meta-analysis of 26 randomised trials in 1,721 people found hydrolysed collagen improved skin hydration and elasticity against placebo; hydration results varied with the source, and elasticity did not differ by source (p = 0.21).³ In one knee osteoarthritis trial, pork-skin and bovine-bone peptides each beat placebo at 13 weeks; neither was compared with the other.¹⁵ The one combination trial gave 68 people with knee osteoarthritis tablets of hydrolysed collagen plus undenatured type II for 12 weeks: both groups improved, the difference between them was not significant, and no adverse effects were reported.¹⁶ Whether a blend adds to, matches or dilutes a single source is what we don't know; nobody has measured it. Every source tested has positive trials, and none has outperformed another.^{3, 15}

Is multi-collagen better for skin, joints or bones?

Each outcome's trials used one source. Skin: 69 women aged 35 to 55 took 2.5 or 5 g for eight weeks and elasticity improved against placebo at both doses.^{3, 4} Joints: a 2024 trial-sequential meta-analysis of 35 randomised trials in 3,165 patients found small to moderate improvements in pain (moderate certainty) and function (high certainty), with no increase in withdrawals or adverse events.⁵ Bone: 131 postmenopausal women took 5 g a day for 12 months and bone density at the spine and femoral neck rose against placebo (p = 0.030 and p = 0.003).⁶ None of these tested a blend. A multi-collagen taken at 2.5 to 10 g is a trial dose of a mixture whose result has not been measured: a gap in the evidence, not a verdict on the product.

Eggshell membrane has its own trials at its own doses: in 150 people with knee osteoarthritis, 300 mg a day for 12 weeks did not change the primary pain score against placebo, while the KOOS pain and daily-life scores improved;¹⁴ in 88 healthy middle-aged adults, 450 mg of hydrolysed membrane for 12 weeks improved facial skin and hair measures and did not change nails.¹⁷ Whether a multi-collagen contains membrane at those amounts is a label question. No collagen of any type or source has an authorised health claim in Great Britain; the register's collagen entries are non-authorised, which is a statement about the register, not about the trials above.¹⁸

What does a multi-collagen label have to tell you?

UK food supplement law requires the label to name the characterising substance, the portion recommended for daily consumption, and the amount per daily portion as a number from the manufacturer's analysis.¹⁹ It does not require the grams to be split by source. "Hydrolysed collagen" is a correct ingredient name for one hide from one country and for a blend of several species from several countries: the law allows it and the consumer cannot tell. A blend combines powders of different molecular weight, taste, smell, colour and solubility, so if the mix changes, one batch can taste or dissolve differently from the last. The checks:

• Grams of collagen per daily serving. The number the trials ran on: 2.5 to 10 g.^{3, 5, 6}
• Grams by source, where declared. A tub listing five types can be almost entirely one of them.
• Allergen emphasis. Fish and egg must be emphasised in the ingredients list.²⁰
• Molecular weight as a range. A consistency check across batches, not a league table.
• Price per 10 g of collagen. Tub price divided by (grams of collagen in the tub ÷ 10).

How to choose a collagen supplement takes each check further; which form of collagen is most effective applies them across formats.

Can you take types 1, 2 and 3 together?

Yes. Types I and III arrive together in any hide peptide, because that is skin's make-up.⁹ Adding type II means either cartilage peptides, which are hydrolysed like the rest, or the 40 mg undenatured ingredient, which is not.^{1, 11} The one trial combining undenatured type II with hydrolysed collagen reported no adverse effects and no difference from placebo at 12 weeks: a safety record, with whether they add up still open.¹⁶ Types of collagen explained maps each type; marine vs bovine collagen covers taking bovine and marine together.

Is multi-collagen vegetarian, halal or allergy-safe?

A multi-collagen is not vegetarian: bovine, fish and chicken collagen are animal tissue; eggshell membrane is vegetarian but not vegan. Is there a vegan collagen covers eggshell membrane. Halal depends on every source in the blend; is collagen halal explains certification. Fish and eggs are among the 14 substances that must be emphasised in the ingredients list, and fish collagen is itself an allergen, as what marine collagen is explains.²⁰ The NHS says to see a GP if you think you may have a food allergy, and to call 999 if your lips, mouth, throat or tongue suddenly become swollen or you are struggling to breathe.²¹

Frequently asked questions

What is the best multi-collagen supplement in the UK?

No trial ranks them, so the answer is the label: grams of collagen per daily serving against the trials' 2.5 to 10 g, the split by source where declared, the allergen lines, and the price per 10 g of collagen.^{3, 5, 19, 20} Bovine collagen peptides shows the same checks on a single-source powder.

Is collagen with all 5 types better?

No trial has compared a five-type blend with a single source, so better has not been measured either way.^{3, 16} Once hydrolysed, a type names the raw material, not a function, and uptake was comparable across fish, pig and cattle peptides in one supplier-funded study of six.^{1, 2} Five types on a label means five raw materials in the tub.

What is the difference between multi-collagen and marine or bovine collagen?

Marine collagen is type I from fish skin and scales; bovine collagen is types I and III from hide; a multi-collagen is several of these together with chicken cartilage and eggshell membrane.^{8, 9} The single-source powders carry the trials; the blend carries the declared grams. Marine vs bovine collagen has each "versus" answer.

Why is multi-collagen rising so fast?

Searches for multi-collagen have climbed sharply over the past year. That is a search trend, not a change in the evidence: the one published blend trial, in 68 people with knee osteoarthritis, found no significant difference from placebo at 12 weeks, and the single-source trials are those listed above.¹⁶

Sources

1. Harris RB, et al. Journal of Dietary Supplements, 2022. PubMed 34060435.
2. Virgilio N, et al. Frontiers in Nutrition, 2024. Supplier-funded crossover, six volunteers. PubMed 39149544.
3. Pu SY, et al. Nutrients, 2023. PubMed 37432180.
4. Proksch E, et al. Skin Pharmacology and Physiology, 2014. PubMed 23949208.
5. Liang CW, et al. Osteoarthritis and Cartilage, 2024. PubMed 38218227.
6. König D, et al. Nutrients, 2018. PubMed 29337906.
7. Ricard-Blum S. Cold Spring Harbor Perspectives in Biology, 2011. PubMed 21421911.
8. Regulation (EC) No 853/2004 (assimilated GB law), Annex III, Section XV: raw materials for collagen. legislation.gov.uk
9. Ramshaw JA. Connective Tissue Research, 1986. PubMed 2938884.
10. Nilsuwan K, et al. Foods, 2021. PubMed 34681306.
11. Lugo JP, Saiyed ZM, Lane NE. Nutrition Journal, 2016. PubMed 26822714.
12. Ahmed TA, Suso HP, Hincke MT. Journal of Proteomics, 2017. PubMed 28087451.
13. Ruff KJ, et al. Clinical Rheumatology, 2009. PubMed 19340512.
14. Kiers JL, Bult JHF. Journal of Medicinal Food, 2021. PubMed 32633648.
15. Kumar S, et al. Journal of the Science of Food and Agriculture, 2015. PubMed 24852756.
16. Yuenyongviwat V, et al. Scientific Reports, 2025. PubMed 40897777.
17. Kalman DS, Hewlings S. Journal of Cosmetic Dermatology, 2020. PubMed 31904175.
18. Great Britain nutrition and health claims (NHC) register (updated 19 May 2026). gov.uk
19. The Food Supplements (England) Regulations 2003, regulation 6. legislation.gov.uk
20. Regulation (EU) No 1169/2011 (assimilated GB law), Annex II: substances causing allergies or intolerances. legislation.gov.uk
21. NHS. Food allergy (reviewed 20 August 2026). nhs.uk