The INKEY List Caffeine Stimulating Scalp Treatment is an overnight scalp treatment that uses caffeine powder and Redensyl to help reduce hair loss by stimulating the scalp and hair follicles, encouraging hair growth and improving hair thickness. For best results, use consistently every night over a 3-month period. It is suitable for anyone with thinning hair, including those with sensitive scalps. Key Ingredients include 1% Caffeine Powder to stimulate the scalp and hair follicles, 1% Redensyl to improve hair growth and reduce hair loss, and 1% Betaine to condition hair, leaving it soft and healthy. Redensyl is a trademark of Givaudan and used with permission. This product contains no animal derivatives and is alcohol and fragrance-free. It is proven to help improve hair growth.