A member asked:

Using biotin 10,000 for hair grow an multivitamins at the same time,is it safe?

A doctor has provided 1 answer

Seems very unnatural: Not a natural thing to do. Biotin deficiency is rare, but can occur in persons with genetic mutations, on long-term antibiotics or anti-convulsants, or who eat a lot of raw egg whites. There is no good evidence that this easily available, over-the-counter supplement is the magic potion for anything. Biotin is safe to take, but 10000 mcg per day is over 60 times the usual dose, so is not advisable.

Answered 2/14/2016

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