Our Hair Growth Serum contain Glycerin Biotin Ricinus Communis(Castor)Seed Oil. It nourishes and protects hair improves the health of hair follicles and promotes hair growth and castor oil keeps hair hydrated. The way to apply it is simple: wash your hair and scalp before use apply 2-3 drops of serum directly to the scalp of the area to be treated and gently press with your hands for 1-2 minutes until the serum is completely dry. It can deeply awaken dormant hair follicles promote the growth of new hair and make hair healthier and thicker.