Hello M.Carmen! This is a maintenance treatment. The first week apply one ampoule daily, the 2nd and 3rd weeks apply them on alternate days. Subsequently make an application twice a week until the desired effects are achieved. Apply a blister after washing, with damp hair, massaging the scalp in circular movements with the fingertips to facilitate the penetration of the product and stimulate blood flow. Leave the product to act for a few minutes for its total absorption. Greetings and thank you very much for contacting us!