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Human evidence is mixed and outcome-specific; skin findings are sensitive to study quality/funding, while knee osteoarthritis meta-analysis suggests symptom benefit.
Recent reviews of randomized trials report improvements in some skin and osteoarthritis outcomes, but skin evidence becomes much less convincing when analyses focus on higher-quality or non-industry-funded trials. Study products and collagen types vary.
Hydrolyzed collagen products differ by source, peptide profile, dose, and co-ingredients. Finished-product claims require a match to the studied preparation and dose.
Generally well tolerated in trials, but allergen/source issues matter, including fish and bovine sources.
COLLAGEN COMPLEX contains both bovine and marine collagen plus multiple co-ingredients, but the manufacturer page does not publish a collagen dose. Existing trial results should be presented as ingredient-level evidence, not proof of product efficacy.
Effects of Collagen Supplements on Skin Aging: A Systematic Review and Meta-Analysis of Randomized Controlled Trials (Systematic review and meta-analysis of randomized controlled trials; PMID 40324552)
Population/scope: 23 randomized trials; 1,474 participants
Evidence scope: Skin hydration, elasticity, and wrinkles
Finding: Overall pooled results favored collagen, but effects disappeared in non-industry-funded studies and high-quality study subgroups.
Limitations: Results were sensitive to funding source and study quality, so pooled positive findings should not be treated as robust proof of skin-aging efficacy.
Directness: Relevant human evidence · verified 2026-10-02
Effect of collagen supplementation on knee osteoarthritis: an updated systematic review and meta-analysis of randomised controlled trials (Systematic review and meta-analysis of randomized controlled trials; PMID 39212129)
Population/scope: 11 randomized trials; 870 participants with knee osteoarthritis
Evidence scope: Knee osteoarthritis pain and function
Finding: Pooled results favored oral collagen for both pain and function outcomes.
Limitations: Between-study heterogeneity was high for both function (I² 75%) and pain (I² 88%), and collagen preparations varied.
Directness: Relevant human evidence · verified 2026-10-02
Important: Ingredient-level evidence is not proof that a finished product has the same effect. Dose, form, population, duration, and formulation must match.
For informational purposes only; not individualized medical advice.