Several things: You may need iron status studies and thyroid function screening if not done already by your Primary Care Doctor. If they are normal, biotin 5mg a day can help thicken hair and strengthen it over a few months and pantothenol in shampoos can thicken hair shafts about 10%. If the labs are abnormal, correcting the problem will usually help the hair within 3 months to reduce breakage and improve hair
Answered 3/22/2017
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4 doctors weighed in across 3 answers
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