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Collagen Supplements: What the Evidence Actually Says

Unflavored collagen peptide powder spilling from a plain pouch on a kitchen counter next to a glass of water and a mug of coffee

Collagen supplements show a modest benefit for osteoarthritis pain, but independent trials find no confirmed effect on wrinkles. Here is what the 2024 and 2025 meta-analyses found, plus safety notes and how to choose.