System 4 Treatment is designed for color-treated hair with progressed thinning. Clinically and dermatologically tested, this treatment helps to refresh the scalp and increase the volume of every strand, leaving your hair looking fuller and thicker. Delivers essential nutrients and antioxidants to the scalp, nourishing and protecting it against damage. This treatment contains UV protecting ingredients for the scalp and hair. THICKENS THE HAIR: clinically designed to add thickness and fullness to dry, damaged, color-treated hair with progressed thinning, with visible results in just 30 days SUPPORTS SCALP HEALTH: gently cleanses the scalp, removing impurities and excess sebum that can clog hair follicles, creating a healthier environment for the scalp REDUCES HAIR THINNING: helps minimize hair breakage, promoting the appearance of fuller, thicker hair while protecting the hair color NOURISHES THE SCALP: infused with antioxidants and UV protecting ingredients, this treatment can nourish and revitalize the scalp, improving its overall health and condition.