Collagen Supplements: Benefits, Dosage and Safety
Collagen supplements (collagen peptides) modestly improved skin hydration and elasticity in a meta-analysis of trials, many of them industry-funded. Small studies suggest less joint discomfort in active people. Collagen is an incomplete protein, so it shouldn't replace other protein sources.
Evidence at a glance
| Use | Grade | What the research shows |
|---|---|---|
| Skin hydration and elasticity | C | Modest improvements in a meta-analysis. |
| Joint discomfort with activity | C | Small trials. |
A: strong, consistent human evidence · B: moderate · C: limited or mixed · D: good evidence of no benefit.
Collagen is the main structural protein in skin, tendons and bone. Supplements are broken down into amino acids and small peptides.
How to take it
Mix 2.5–10 g of powder into a drink daily for at least 8–12 weeks. Compare sources in marine vs bovine collagen.
Safety and interactions
Generally well tolerated. Choose third-party tested products to limit contaminants.
Always tell your doctor and pharmacist about the supplements you take. Check combinations with our interaction checker.
Sources
This page is for education and is not a substitute for advice from your doctor. Read our medical disclaimer.