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Collagen peptides

Also known as: Hydrolyzed collagen, Collagen hydrolysate

Protein fragments from animal collagen, marketed for skin and joints.

Common forms: Powder · Capsules · Drinks

Draft summary, not yet reviewed by a qualified health professional · Last updated 2026-11-03

Talk to a healthcare professional first

This information is for education only and is not medical advice, diagnosis, or treatment. Supplements can interact with medications and health conditions. Check with your doctor or pharmacist before starting anything, especially if you take medication, are pregnant or breastfeeding, or have a health condition. These statements have not been evaluated by the FDA; supplements are not intended to diagnose, treat, cure, or prevent any disease.

What the evidence says

Skin

DInsufficient evidence

Some meta-analyses report improved skin hydration and elasticity, but a 2025 meta-analysis found no effect in studies without industry funding or in high-quality studies — benefits appeared only in industry-funded and lower-quality trials.

Dose used in studies
2.5–10 g/day (in trials)
Time to effect
8–12 weeks (in trials)
Studies (2)

Safety

Common side effects

  • Mild stomach upset
  • Feeling of fullness

Avoid or ask your doctor first if

  • You're allergic to the source (fish, bovine, or porcine)

Pregnancy & breastfeeding

Not enough safety data — avoid unless your provider recommends it.

Medication interactions

No well-documented interactions with common medication classes. Still tell your pharmacist what you take.

This list covers common medication classes only and is not exhaustive.

Further reading