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 & other environmental residue, prepping the scalp & hair for the following steps of the treatment. Ideal for coloured or thinning hair, the shampoo encourages healthier & thicker-looking locks.