For increased protection, Dr. Wolff Research has developed the Nutri-Caffeine Elixir for young women. With its Nutri-Caffeine Complex, the scalp tonic provides protection from an energy deficit in the hair roots, thereby preventing premature disruptions of hair growth. Apply the Nutri-Caffeine Elixir to the scalp once a day & massage in. Do not rinse out. The active ingredient complex travels along the hair shaft & forms a 24-hour active ingredient depot in the scalp. Application of the Nutri-Caffeine Elixir is particularly suitable for women who do not wash their hair every day.