Nioxin's System 2 Shampoo is the first step in their professional regime designed for thicker-looking lengths. This shampoo effectively removes impurities and excess oil while minimizing the risk of breakage. Specifically created for natural hair with progressed thinning, the formula utilizes a blend of biotin and niacinamide to help noticeably strengthen brittle strands. In just 30 days, hair is amplified with visible body and fullness. Dermatologist tested. The shampoo nourishes and gently cleanses to prevent against follicle-clogging sebum, creating a healthier environment to support hair growth. It's clinically designed to add thickness and fullness with visible results in just 30 days. Nioxin System 2 Shampoo reduces hair thinning by helping to minimize breakage. Formulated with a powerful blend of niacinamide, biotin, and caffeine to help nourish the hair root, stimulate hair follicles, and strengthen the hair. The advanced formula contains ingredients that strengthen hair resilience, minimize breakage, and promote the appearance of thicker, fuller hair. Key ingredients include Mentha Arvensis Leaf Oil, also known as wild mint oil, which is known for its refreshing and invigorating benefits that stimulate the scalp and promote circulation, and Peppermint Oil, which can assist in regulating sebum production and controlling oil.