Last updated July 2026 · 6 minute read
The short answer. Hydrolysed collagen, also called collagen peptides, has been broken into small chains your body can absorb. Ordinary collagen is too large to digest well, so hydrolysed is the form that actually gets used.
What hydrolysed means
Hydrolysis breaks collagen down into short peptides, a fraction of the size of whole collagen. Those smaller pieces pass through the gut wall and into the bloodstream, where the body can put them to use. In plain terms: hydrolysed means absorbable, and absorbable means effective.
Why absorption matters
You can take an impressive number of milligrams, but if the collagen is not broken down your body cannot use most of it. This is the single biggest reason cheap collagen disappoints. Prioritise the word hydrolysed on the label above almost everything else.
Hydrolysed collagen versus gelatin and raw collagen
| Form | Absorption |
|---|---|
| Hydrolysed peptides | High. Small chains, readily absorbed, dissolves in cold liquid. |
| Gelatin | Partly broken down. Gels when cold, less convenient. |
| Raw collagen | Low. Molecules too large to absorb well. |
The marine advantage
Hydrolysed marine collagen pairs the absorbable peptide form with a source rich in Type 1 collagen, the type most abundant in skin, which is why it is such a popular choice for women.
Eternal Collagen: 15,000mg in one daily cap
Hydrolysed marine collagen, enriched with 19 essential vitamins and minerals, in a tropical flavour that mixes easily into water, juice or a smoothie. One 25ml cap a day, made in the UK.
Frequently asked questions
What is hydrolysed collagen?
Hydrolysed collagen, or collagen peptides, is collagen broken into small chains your body can absorb. It is the most usable everyday form.
Is hydrolysed collagen the same as collagen peptides?
Yes. Hydrolysed collagen and collagen peptides are two names for the same thing, collagen broken down for better absorption.
Is hydrolysed collagen better?
For absorption, yes. Ordinary collagen is too large to digest well, so hydrolysed is the form your body can actually use.
Does hydrolysed collagen have side effects?
It is generally well tolerated. Some people notice mild digestive effects at first. Do not exceed the recommended intake, and check with your GP if you have a health condition.