Use the shampoo daily or at least 3 times a week. Apply the shampoo onto wet hair. Gently rub it in for 2-3 minutes, and then rinse with water. If the product gets into your eyes, wash them with water right away. The shampoo gradually makes your gray hair darker with each use. Preventively, supplement the shampoo once a week with the trichology cleansing peel H-STIMUPEEL. To enhance the hair growth stimulating effect, use in combination with the Pharmaceris H-STIMULINUM conditioner and product H-STIMUFORTEN.