Nioxin Hair Care System 4 Kit for color treated hair with progressed thinning amplifies hair structure and protects against hair breakage. This unique set of three professional hair products, based on an advanced skin care approach, is specially formulated as a hair thickening treatment, delivering fuller-looking hair and color protection. The Nioxin System 4 regimen reduces hair fall due to breakage, strengthens the hair and delivers a healthy shine to color treated hair, while refreshes the scalp. The Nioxin Cleanser Shampoo removes dirt, excessive oil and other environmental residues from the scalp and hair. Nioxin Scalp Therapy Conditioner is a lightweight conditioner that helps provide hair resilience, hydrates scalp and hair from root to tip. Nioxin Scalp & Hair Treatment refreshes the scalp and increases hair volume of every strands.