Supplement

Collagen peptides

Mixed findings

Broken-down collagen protein rich in glycine and proline. Commonly discussed in relation to skin and joints; evidence varies by outcome, dose, and study design.

Often discussed in relation to

Hair and nails Skin Recovery

A possible source of

Glycine Proline

Often considered alongside

Hyaluronic acid (supplement)Supplement Placenta extract (supplement)Supplement