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Question:
Do biotin supplements really improve hair and nails?

Answer:
Biotin supplements are often promoted to improve hair growth, strength, or sheen -- possibly because biotin deficiency can cause symptoms such as dry, thinning hair and loss of hair color. However, biotin deficiency is quite rare -- the recommended daily intake of biotin is easily obtained from food, and there is no evidence biotin improves the growth or texture of hair in people who are not deficient.

Preliminary evidence that biotin supplementation may strengthen brittle nails.

Be aware that biotin, especially taken at high doses, can interfere with certain medications and laboratory tests.

For details, see the Biotin section of the B Vitamin Supplements Review, which includes CL's test results of products >> and CL's Top Pick among biotin supplements.

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Also see these related CL Answers:



Can vitamin supplements strengthen brittle nails? >>

I am female and just purchased a saw palmetto supplement for hair loss. However, it says on the bottle that it is only for use by men. Is it really unsafe for women? Lots of sites suggest its use, but I'm fearful of trying it now.  >>

Do any supplements help for hair loss? >>



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Comments
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Gretchen14029   May 13, 2017
I've had success using biotin to get rid of psoriasis on my elbows.

Enid14019   May 10, 2017
Over 35 years having lost four feet of terminal ileum to 3 surgical resections because of Crohn's disease I am chronically malnourished. Several years of Biotin supplements to try to slow hair loss and treat brittle, peeling nails has not helped, but Zinc taken at the behest of my endocrinologist (for bones) has done an amazing job in the past 6-9 months; My nails are still ridged and not attractive but I can work in the garden without any breaks or peeling. I wonder if this information will be useful to others.

Leslie14064   May 30, 2017
I have exactly the same clinical situation, and thank you!

This CL Answer initially posted on 5/9/2017. Last updated 7/25/2017.

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