Hi Dr. How much biotin should I take a day for hair loss???
Biotin deficiencies can cause hair loss, so many people may include biotin in their vitamin regimen. However in healthy people it is almost impossible to have a deficiency of biotin. A biotin deficiency is therefore extremely rare in the United States. When it does occur, it may be associated with disease conditions of the gastro-intestinal digestive tract. An adequate daily dosage for biotin is 30-100 mcg for the adult male.