Enhance hair’s fullness with the Nioxin System 4 Cleanser Shampoo for Coloured Hair with Progressed Thinning. The first step in a 3-part routine, the shampoo works to cleanse away impurities, while helping to strengthen the hair structure. With Glyco-Shield technology, the formula helps to remove sebum, fatty acids and other environmental residue, prepping the scalp and hair for the following steps of the treatment. Ideal for coloured or thinning hair, the shampoo encourages healthier and thicker-looking locks.