Item Description Nioxin System 4 is made especially for fine, chemically enhanced, noticeably thinning hair. The Nioxin Starter Kit 4brings all three parts of Nioxin System 4. The three steps are cleansing, conditioning and nourishing. For added protection, specifically from UVA/UVB rays, Nioxin Starter Kit 4 contains SPF 15. The Nioxin Starter Kit 4 uses BioAMP to thicken and strengthen the hair. The Glyco-Fused Complex protects the scalp from irritation or drying due to chemical services. Unique Scalp Access Delivery System protects nutrients that nourish the scalp and hair. Nioxin Starter Kit 4 Includes: - Nioxin Cleanser 4 (10.1 oz.): Gently washes away residue, toxins and DHT (Dihydrotestosterone). - Nioxin Scalp Therapy System 4 (10.1 oz.)  - Nioxin Scalp Treatment 4 (3.4 oz.): This daily scalp treatment improves the appearance of thinning hair.