Review Finds Collagen Aids Skin and Joints in 113 Trials, but Benefits Weaken in Better Studies
Updated
Updated · Okdiario · Jul 31
Review Finds Collagen Aids Skin and Joints in 113 Trials, but Benefits Weaken in Better Studies
3 articles · Updated · Okdiario · Jul 31
Summary
A 2026 Umbrella review covering 113 randomized trials and nearly 8,000 people found oral collagen showed overall benefits for skin and osteoarthritis, though long-term effects and the best sources or formats remain unclear.
Hydrolyzed collagen peptides emerged as the most practical daily option because they are easiest to mix and are the form most often studied for skin hydration and elasticity.
Evidence for skin remains mixed: a 2023 Meta-analysis of 26 trials and 1,721 participants found better hydration and elasticity, but a 2025 review said those gains disappeared in higher-quality or non-industry-funded studies.
For joints, an updated 2024 analysis of 11 trials with 870 people found improved pain and function scores, but researchers said collagen should complement—not replace—exercise, weight management, diagnosis and prescribed treatment.
The review said timing matters less than steady use over weeks or months, while adequate protein, vitamin C, sleep, sun protection and product-label scrutiny still do more of the heavy lifting.