People mainly take Collagen for skin & hair, recovery, pain & inflammation. Based on 150 first-hand reports and 9 meta-analyses & systematic reviews in the medical literature. Ranked #86 of 1,974 overall.
Of reports that state an outcome, 52% are positive.
Of the people who reported each effect, the share who said it got better.
Systematic reviews and meta-analyses from PubMed, with their published conclusions.
3+ meta-analyses or systematic reviews and 10+ randomized controlled trials in humans. The grade measures how much human research exists — read the conclusions below for what it found.
Conclusion: The findings of improved hydration and elasticity were also confirmed in the subgroup meta-analysis. Based on results, ingestion of hydrolyzed collagen for 90 days is effective in reducing skin aging, as it reduces wrinkles and improves skin elasticity and hydration.
PubMed 33742704 ↗Conclusion: The results of this meta-analysis suggest that oral collagen administration relieves OA symptoms. Our findings revealed noteworthy improvements, statistically and clinically, in both functional and pain scores.
PubMed 39212129 ↗Conclusion: J Drugs Dermatol. 2019;18(1):9-16.
PubMed 30681787 ↗Conclusion: In this systematic review, three different mechanisms of action were clarified for the intervention. Direct effects of collagen peptides on fibroblasts, M2-like macrophages, and oral tolerance-related mechanisms are the possible mechanisms for the beneficial effects of collagen supplementation.
PubMed 32436266 ↗As stated by users — not a recommendation. Follow the label or your doctor.
How often each side effect came up across all reports.
Verbatim quotes, shortened only — each links to the original discussion.
“sorry I forgot to mention I am taking 7g of collagen daily”
“General health: collogen, multivitamin pack, fishoil, methylated folate and B12”
“or just ad more collagen”
“Collagen - 6,000 mg”
“I started by taking a long list of supplements, these included (at the start) NMN, NAD, NAC and collagen.”
User data from public discussions; research from PubMed. Information only, not medical advice — talk to a doctor before starting, stopping or combining anything. Data updated October 2, 2026. How we rate