Difeel Pro-Growth Biotin Hair Mask 12 oz.Strengthening formula with Biotin.Biotin is a water-soluble vitamin that’s a part of the vitamin B family. Your body needs biotin to help convert certain nutrients into energy.Natural mask for hair growth.Deeply repairs damaged hair. Biotinalso plays an important role in the health of your hair, skin, and nails. If you aren’t getting enough biotin, you may experience hair loss.Promoteslonger hair by strengthening the hair follicle for healthy hair growth.Sulfate Free – Paraben Free – Phtalate Free – Color Safe Formula