What Vitamins are needed to grow Human hair on head thicker,longer stronger?

I would definitely recommend biotin if you wish your hair to grow thicker, longer and stronger. I've proven it to myself after taking biotin for almost a year I got amazing results on my hair. My hair's thicker and stronger and it won't easily break. I've learned that  Biotin is actually vitamin H which is part of the B Complex group of vitamins. Biotin is not only beneficial to your hair but as well as to your skin and nails. You should try biotin and see the amazing results to yourself.;-)