Discover the best Pro-Growth Biotin Shampoo for hair growth that Difeel has for you with its fortifying Formula and fortified with biotin, a water soluble vitamin that is part of the vitamin B family. Your body needs biotin to help convert certain nutrients into energy. Biotin plays an important role in the health of your hair, skin, and nails. Lack of biotin can cause hair loss. Biotin Pro-Growth works to keep your hair color vibrant while giving it manageability, smoothness and shine. Sulfate-free, paraben-free, phthalate-free, color-safe formula.