10,000 mcg Biotin. My hair is now at hip length with this! (I switched to this 4 months after stopping Viviscal). It took me a total of 19 months to get from a shoulder blade length cut to the top of my hip bones. When it reaches an inch or two past tailbone length, I will start trimming it more regularly to maintain it at tailbone.
Foods for Healthy Hair: 5 Secrets for Longer, Thicker Hair:Hairfinity hair vitamins contains Biotin plus many other nutrients specifically for healthy hair growth. http://hairfinity.com/blog/foods-for-healthy-hair/