Our black castor essential oil contains glycerol, hyaluronic acid, and castor oil. It can nourish and protect hair, improve the health of hair follicles, promote hair growth, and castor oil can maintain hair moisture. Its usage is very simple: after washing your hair, use a dropper to take an appropriate amount of essential oil and apply it evenly to your hair, then gently massage until it is fully absorbed. It can deeply awaken dormant hair follicles, promote the growth of new hair, and make hair healthier and denser.