Intensive treatment: 1 ampoule daily for 6 weeks. Maintenance treatment: 3 ampoules per week. Use on wet or dry scalp. Do not remove or pierce the cap of the ampoule. Place the applicator vertically on the ampoule. Tighten the applicator until it locks. Do not remove the metal tip from the applicator. Press the membrane to let the preparation flow out of the applicator. If the preparation flows too slowly: shake. If it flows too quickly: tighten the applicator Apply the preparation strand by strand at the roots of the hair, massaging the scalp in a zigzag motion. Do not rinse the product after application. Wet your scalp and press your head with a vertical movement of your hands. Rinse the applicator after each use. Avoid contact with eyes. If the product gets into your eyes, rinse them immediately with water.