System 4 Shampoo is designed for dry, damaged, color-treated hair with progressed thinning. Clinically and dermatologically tested, this shampoo nourishes and gently cleanses your hair to prevent against follicle-clogging sebum, resulting in thicker, fuller hair. Formulated with a powerful blend of wild mint oil, peppermint oil, and salicylic acid. THICKENS THE HAIR: clinically designed to add thickness and fullness to natural hair with progressed thinning, with visible results in just 30 days SUPPORTS SCALP HEALTH: advanced formula gently cleanses the scalp, removing impurities and excess sebum that can clog hair follicles REDUCES HAIR THINNING: helps minimize hair breakage, promoting the appearance of fuller, thicker hair NOURISHES THE SCALP: infused with antioxidants and UV protecting ingredients