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4Optional

Collagen peptides

Also sold as Collagen, hydrolysed collagen

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

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

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 attached yet. Treat this as a starting point, not a citation, until reviewed.

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.