I swear by Biotin. Biotin has made my curly hair longer. I always wondered why my hair never went past a certain length then I heard about the vitamin Biotin. It really changed how my hair feels and how long it got. It is now longer then it has ever been and many people see a difference.
I started taking 1 pill in the morning and 1 pill at night and I saw a difference in my nails and hair within 2 months. It is a wonderful harmless product.