Direction for use. After washing hair with VIGORANCE HAIR LOSS specific shampoo, remove excess water and, parting hair with a comb, apply one ampoule of tretment. Using fingertips, rub in with a light circular massage for optimum absorption. Leave on for a few minutes and style as usual without rinsing. FREQUENCY: Use 1 or 2 ampules per week depending on the depth of the problem.