The Edit
How collagen works, when to expect results, and what the research actually says. Written for people who read before they buy.
How Long Does Collagen Take to Work? The 30, 60 & 90 Day Timeline
The Short Answer: Collagen takes 4-6 weeks for early changes in nails and hair, and 8-12 weeks for measurable skin improvements. A 2023 systematic review of 26 randomised controlled trials found th...
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