An overhead view of a bowl of powdered collagen supplement and a wooden spoon sit on a green background.

Luis Echeverri Urrea/Getty Images

Collagen is the most abundant protein in the body. It helps keep skin firm and elastic. But as starting in our 20s, the amount and quality of that collagen starts to decline.

Collagen supplements have been widely promoted on social media, with claims that they’ll strengthen hair and nails, lessen wrinkles and even ease joint pain. But are there studies backing these claims? NPR health correspondent Maria Godoy dives into the research and shares science-backed tips for better skin that are more effective.

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