The INKEY List Caffeine Stimulating Scalp Treatment is an overnight scalp treatment that uses caffeine powder and an ingredient called Redensyl™ to help reduce hair loss by stimulating the scalp and hair follicles, therefore encouraging hair growth and helping to improve hair thickness. Consistent use every night over a 3 month period produces best results. Who It's For: - Anyone with thinning hair, including those with sensitive scalps. Key Ingredients: - 1% CAFFEINE POWDER: Helps to stimulate scalp and hair follicles. - 1% REDENSYL™*: Helps to improve hair growth while reducing hair loss. - 1% BETAINE: Helps to condition hair, leaving it soft and healthy. *Redensyl™ is a trademark of Givaudan and is used with permission. Product Claims: - Proven to help improve hair growth* *Data based on a 10 day ex-vivo study using 24 male hair follicles, using Redensyl™ at 1%. This product contains no animal derivatives and is alcohol and fragrance free.