uses JavaScript to provide the best possible experience for our content, but your browser has it disabled. Learn how to enable it here.


Biotin Supplements for Hair and Nails -- woman looking at hair and nails in mirror


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, including tests used to diagnose thyroid disease and heart attacks, so be sure to tell your doctor if you are taking biotin.

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

Join today to unlock all member benefits including full access to all CL Answers and over 1,300 reviews.

Join Now

Join now at


Join the conversation

May 13, 2017

I've had success using biotin to get rid of psoriasis on my elbows.

March 31, 2019

I have also had Bioton do this same thing for me !

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.

May 30, 2017

I have exactly the same clinical situation, and thank you!

Join today to unlock all member benefits including full access to CL Answers

Join Now

Join now at