Osmotics' optimal performance shampoo is uniquely formulated for thinning, fine or weak hair and for use in combination with follicle nutrient serum. Its gentle, yet thorough cleansing action removes sebum buildup while essential vitamins and minerals promote stronger, thicker, healthier hair. This advanced formula contains an extremely mild surfactant (lathering agent) along with a specific combination of natural ingredients that perfectly prepare the scalp to receive the optimal benefits from follicle nutrient serum.