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.