Do collagen supplements deserve their hype? - The Globe and Mail

Collagen is credited for rejuvenating skin and smoothing wrinkles, promoting nail and hair growth, easing joint pain, strengthening bones, even building muscle. But do these supplements deliver on their promises?

A few small clinical studies suggest that collagen supplements can reduce pain in people with knee osteoarthritis. However, the improvements are modest and benefits may take three to five months to a… [+5111 chars]

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