Nioxin Derma Purifying System 4 Cleanser Shampoo (Colored Hair, Progressed Thinning, Color Safe) 500ml 16.9oz Size:1000ml 33.8oz a biological energy to stimulate Apply with a slightly a biological energy to stimulate cellular vital functions Formulated with Actinergie to boost cellular oxygenation & promote cell metabolism Contains Cellular Life Complex featuring 56 biological actives essential to skin cell regeneration Enhanced with Hydrocyte Complex that moisturizes & binds water to cells & replenishes dehydration lines Reduces puffy eyes & heavy eyelids with Eyeliss Leaves the eye contour smooth Concentrated with botanical essences including Chamomile Step 1 of 3D Care System Kit 4 Specially designed for colored hair with progressed thinning Developed with Pro Color Shield to cleanse scalp for better hair follicle health Removes follicle clogging sebum fatty acids & environmental residues from scalp & hair Leaves hair clean