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4Optional

Collagen peptides

Also sold as Collagen, hydrolysed collagen

Popular for skin and joints; effectively an expensive glycine source.

TrustedSupp Tier System™ · Tier 4Take by choice, or not at all

Evidence strength

45/100Limited
WEAKLIMITEDMODERATESTRONGVERY STRONG

What the evidence supports: skin elasticity and joint comfort in industry-funded trials.

This scores how well-supported the claim above is — not how much benefit you personally would get. A high score on a narrow claim does not extend to everything the product is marketed for.

How long to take it

Twelve weeks to judge skin effects in trials.

Who it's actually for

People interested in skin elasticity or joint comfort, with modest expectations.

Safe upper limit

Unverified
No formal limit; 10–15 g daily is typical
Safe. The question is value, not risk.
No source or citation attached yet.

Interactions to know about

No commonly documented medication clashes in our data. That is not the same as none existing.

Other supplements:

Run your full list through the interaction check.

Practical notes

  • Your body breaks it into amino acids — it does not travel to your face intact.
  • Vitamin C is required for your own collagen synthesis, so pair them.
  • Glycine powder delivers much of the same at a fraction of the cost.