Nioxin System 4 Scalp + Hair Shampoo is a professional cleanser formulated to gently remove buildup while supporting thicker, fuller-looking color-treated, damaged hair with progressed thinning. Designed as the first step in Nioxin’s three-part regimen, System 4 uses Pro-Color Shield and Activ Renewal technologies...

Nioxin System 4 Scalp + Hair Shampoo is a professional-strength cleansing formula made to gently remove buildup and support thicker-looking, color-treated hair with progressed thinning. This shampoo is the first step in Nioxin’s three-part System 4 regimen, formulated for dry, chemically treated hair that...

Nioxin System 4 Scalp + Hair Thickening Treatment is a leave-in serum formulated to nourish the scalp and increase hair diameter for color-treated hair experiencing progressed thinning. This professional-strength leave-in is the third step in Nioxin’s System 4 regimen, designed specifically for color-treated, damaged...

Nioxin System 4 Shampoo & Conditioner Prepack is a two‑step salon-grade regimen formulated to strengthen, thicken appearance, and protect color-treated, dry or damaged hair with progressed thinning. Designed as the first two steps of Nioxin’s three-part professional protocol, this prepack pairs a deep-cleansing cleanser...

Nioxin Density Defend Volumizing Dry Shampoo is a lightweight dry cleanser that instantly refreshes fine hair while adding visible fullness and texture. This salon-developed dry shampoo is formulated to absorb oil, lift roots, and create the appearance of denser, fuller-looking hair without heavy residue....