Biotin is important for hair health, including hair growth; this is because it is utilized in cell. In fact, biotin also helps thicken the hair stands. Zenith Nutrition HairFab contains Biotin and other such important ingredients that increases the health of your hair. Folic acid and pyridoxine are essential for the hair, and their deficiencies lead to hairloss. Folic acid is needed for cell renewal so as to enable hair growth.