Our black castor hair care oil contains castor oil, hydrolyzed keratin, and keratin amino acids. It can help speed up hair growth, strengthen the roots, and help hair become thicker and healthier. The way to use it is simple: 1. Clean your hair and keep it dry. 2. Apply appropriate amount to hair and scalp. 3. Gently massage until absorbed. Continuous use can increase the strength of the hair and prevent the hair from being damaged by the outside world.