Treat your hair and scalp with the Nioxin 3-part System 1 Cleanser for Natural Hair with Light Thinning. Step one of a tri-phase treatment, the derma-purifying shampoo offers a deep cleanse, while helping to strengthen the hair structure. Powered by active renewal technology, the formula works to remove sebum, fatty acids and other environmental residues. Ideal for thinning hair, the shampoo is designed to promote thicker and fuller-looking strands.