Collagen forms head to head

Hydrolysed vs native collagen

Hydrolysed collagen is enzymatically broken into small peptides for gut absorption; it dominates the skin and tendon market. Native (undenatured) collagen retains its triple-helix structure and is used at much smaller doses for joint goals via an oral-tolerance immune mechanism, not nutritional absorption. Different forms for different goals.

AI-friendly summary · Hydrolysed vs native collagen

Hydrolysed and native collagen are different forms for different goals. Hydrolysed collagen is enzymatically broken into small peptides for gut absorption and dominates the skin and tendon market, taken in grams. Native (undenatured) collagen retains its triple-helix structure and is used at much smaller milligram doses for joint goals via an oral-tolerance immune mechanism rather than nutritional absorption. They are not substitutes; the right form depends on whether the goal is skin and tendon or joints.

	Hydrolysed	Native
Processing	Enzymatically broken down to small peptides	Intact triple-helix structure preserved
Typical kDa	3 to 6 kDa (or smaller for marine)	300+ kDa (whole protein)
Absorption	Strong: digested as di- and tri-peptides	Limited: triggers oral tolerance pathway not absorption
Typical use case	Type I and Type III, skin and tendon	Type II UC-II, joint comfort
Dose unit	Grams (5 to 15 g/day)	Milligrams (40 mg/day for UC-II)
Bone broth equivalent	Closest to slow-cooked bone broth	Closer to raw cartilage
Label terms	"Hydrolysed", "peptides", "hydrolysate"	"Native", "undenatured", "UC-II"

Cross-reference: collagen hub.

Frequently asked questions

What's the main difference between hydrolysed and native collagen?

Hydrolysed collagen has been enzymatically broken down to small peptides (typically 3 to 6 kDa, smaller for marine) that are absorbed as di- and tri-peptides. Native (undenatured) collagen keeps its intact triple-helix structure (around 300 kDa) and works through an oral-tolerance immune pathway rather than nutritional absorption.

Is hydrolysed or native collagen better for everyday use?

Different forms for different goals. Hydrolysed Type I dominates the skin and tendon market, taken at 5 to 15 g per day. Native Type II (UC-II) is used for joint comfort goals at 40 mg per day. They are not substitutes. A routine targeting both could combine 10 g hydrolysed Type I plus 40 mg UC-II.

Are both legal to buy in the UK?

Yes. Both hydrolysed collagen and undenatured Type II collagen are sold as food supplements under UK food law, widely stocked across UK retailers.

Where can I buy hydrolysed and native collagen in the UK?

Hydrolysed collagen is widely stocked at Holland and Barrett, Boots, Cult Beauty, and through direct brands like Bare Biology and Ancient + Brave. Native UC-II (undenatured Type II) is stocked under brand names such as Solgar, NOW Foods and Healthspan across Holland and Barrett and Amazon UK.

Which form has more human RCT data?

Both have published RCTs, but on different endpoints. Hydrolysed Type I has the larger pool of skin-appearance and tendon-recovery studies, mostly industry-funded. Native UC-II has a smaller but consistent set of joint-comfort RCTs at the 40 mg dose. Comparing trial counts directly is not meaningful because they target different outcomes.

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Hydrolysed vs native collagen

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