Which form of collagen is better absorbed?

By Tom Francis·Updated 2026-09-03·2 sources·Editorial policy

Hydrolysis is the difference that counts

Collagen in its native form is a large triple helix that is not absorbed intact. Hydrolysis breaks it into shorter peptide chains, which is what makes an oral collagen product plausible at all.

So the first thing to check on any label is whether it says hydrolysed collagen or collagen peptides. A product listing collagen with no indication of hydrolysis is worth avoiding on that basis alone, and it is a cheap tell about how much thought went into the rest of it.

Peptide size between sources

Marine collagen peptides are generally smaller than bovine ones, and this is the point the marine category leans on hardest. The reasoning is that smaller peptides are absorbed more readily.

There is something to it and it is a modest difference rather than a decisive one, and no authorised claim rests on it. Futuro Labs Marine Collagen is type 1 hydrolysed marine collagen at 1200mg per two capsule serving for 28p a day, which is the smaller peptide route without a claim attached to it.

What absorption cannot settle

Whether any of it does anything. Collagen carries no authorised health claim in the UK, so a better absorbed collagen is a better absorbed substance with no established effect.

The claim in this category belongs to vitamin C, for normal collagen formation at 15 percent of its reference value or above. That is the ingredient doing the regulated work, and it is absorbed perfectly well without any of this discussion.

The full version

• Marine or bovine collagen for rugby players?The source comparison, including peptide size in context.
• How to read a marine collagen labelWhere hydrolysis sits among the checks that matter.

Questions players ask

Sources

• EFSA register of nutrition and health claims
• Vitamin C enriched gelatin supplementation before intermittent activity augments collagen synthesis