Collagen peptides

Skin & joints · Dietary supplement · protein hydrolysate · Source checked October 5, 2026 · Not reviewed by a medical professional

Moderate human evidence

Collagen peptides are broken-down collagen protein. Pooled trials found better skin hydration and elasticity than placebo, but many of the trials had biases.

Also called: Hydrolyzed collagen, Collagen hydrolysate

Featured study

Effects of Oral Collagen for Skin Anti-Aging: A Systematic Review and Meta-Analysis ↗
Nutrients · 2023 · PMID 37432180

Who was studied: 1,721 participants across 26 randomized controlled trials.
How: Systematic review and meta-analysis of hydrolyzed collagen versus placebo.
What it found: Hydrolyzed collagen improved skin hydration and elasticity compared with placebo. Hydration results varied with the collagen source and how long it was taken.
Limits: The authors identified several biases in the included trials, and many collagen trials are industry-funded. Skin measurements are surrogate measures, not proof of visible anti-aging results.

Safety & what remains unknown

Collagen supplements are generally well tolerated. People with fish, shellfish or other animal-protein allergies should check the source, and quality varies between products.

Talk to a clinician before starting a supplement, especially if you are pregnant, take prescription medicines or have a medical condition.

Where to find it

Search results and listings are not quality-checked or endorsed by PepsRadar. Look for third-party testing (for example USP or NSF marks) and check with a clinician about interactions.

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