Collagen Peptides and Skin Hydration and Elasticity
Collagen is the main structural protein of connective tissues and makes up roughly 80% of the dry weight of human skin. In adults, pooled randomized-trial evidence suggests oral collagen peptide supplementation may modestly improve skin hydration and elasticity.[1]
What collagen is
Collagen is the main structural protein of connective tissues and makes up roughly 80% of the dry weight of human skin.[1]
What the pooled trials report for skin
In adults, pooled randomized-trial evidence suggests that oral collagen peptide supplementation may modestly improve skin hydration and elasticity. Across the trials, collagen peptides were studied at about 2.5 to 10 grams per day.[1]
Evidence limitations
These findings come from a meta-analysis of trials with notable heterogeneity, small samples, and possible bias, and participants were predominantly female adults. The effects are modest, and further large trials are needed.[1]
References
- Effects of Oral Collagen for Skin Anti-Aging: A Systematic Review and Meta-Analysis. Nutrients. 2023. Systematic review and meta-analysis. View source