High-level evidence generally supports a modest improvement in skin elasticity from oral collagen supplements (often hydrolyzed collagen or collagen peptides). A systematic review and meta-analysis of 26 RCTs (1,721 participants) reported a significant elasticity improvement (p < 0.00001), and another meta-analysis found a statistically significant effect size for elasticity (SMD 0.61, 95% CI 0.21–1.02). An umbrella review pooling evidence across 113 trials and nearly 8,000 participants also concluded collagen supplements modestly improve elasticity.
However, the size and reliability of the benefit depend on the product (type and molecular weight), dose, and study quality. The verification notes that when analyses restrict to higher-quality or independently funded trials, the apparent benefits can shrink—suggesting industry funding and methodological limitations may inflate results in some studies. Overall, the direction of effect is supported, but expectations should be modest and based on consistent use over weeks rather than immediate changes.
This analysis is for informational purposes only and does not constitute health or medical advice, diagnosis, or treatment. Always consult a qualified healthcare professional before making health-related decisions.