Love this stuff. Also is good for temporary relief of fatigue. I've been taking it for 2 weeks now in hopes that it will keep my hair from falling out . So far it is falling out less. I take 5000mcgs a day in the morning. It has helped me a little with fatigue (a little that is) . It also supposed to help with metabolism . http://en.wikipedia.org/wiki/Biotin I also take folic acid for hair loss.