The biotin will help a little, if there is a sufficiently high dosage, but oral collagen is useless for hair and nails. Get your money back and buy pure biotin, a minimum of 5000 units/day. If that is ineffective, see a dermatologist for a complete evaluation.
Answered 1/5/2022
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A doctor has provided 1 answer
A doctor has provided 1 answer
A doctor has provided 1 answer
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