Our Biotin Hair Growth Serum contains biotin, glycerin and ginger root extract. It can nourish and protect hair, but also improve the health of hair follicles, promote hair growth, castor oil can keep hair moisture, and the fatty acids in it can also supplement the natural oil of hair, protect hair. Its use method is very simple: put the nozzle about 10 cm away from the hair, spray evenly on the hair, gently massage until it is completely absorbed. It can deeply awaken dormant hair follicles, promote the growth of new hair, and make hair healthier and thicker.