Nioxin System 4 Scalp + Hair Shampoo for Color-Treated Damaged Hair — 10 fl oz, Thickening & Color-Protecting

Nioxin System 4 Scalp + Hair Shampoo is a professional-grade cleanser formulated to gently remove buildup and help restore the look of thicker, fuller color-treated, damaged hair with progressed thinning.

If you have dry, chemically treated hair that shows signs of thinning, this shampoo is the first step in Nioxin’s three-part regimen designed to strengthen hair structure and improve scalp condition. With Pro-Color Shield and Activ Renewal technologies, the formula targets sebum, fatty acids and environmental residues that can weigh hair down and obscure natural volume, while helping preserve color vibrancy.

How does this shampoo prepare hair and scalp for thicker-looking results?

The cleanser works by removing follicle-clogging impurities and excess oils that undermine scalp health and hair body. Clearing the scalp creates a cleaner foundation for conditioner and topical treatments to work more effectively, allowing hair strands to appear fuller and feel stronger.

• Gentle derma-purifying action removes sebum and environmental residue.
• Activ Renewal technology targets buildup that can flatten hair.
• Prepares hair for System 4 conditioner and scalp treatment to amplify structure.

Will it protect my salon color while improving hair thickness?

Yes — Pro-Color Shield technology is formulated to help maintain color-treated hair while addressing progressed thinning. The shampoo cleans without stripping dye, so color vibrancy lasts longer as you follow the full Nioxin routine.

• Formulated specifically for color-treated, damaged hair.
• Cleanses without harsh stripping agents that fade color quickly.
• Designed to be used daily as part of a color-safe regimen.

How should I use System 4 Shampoo for best results?

Apply the product to wet hair, massaging the scalp and hair to lather for about one minute, then rinse thoroughly. For an optimized routine, use daily and follow with Nioxin System 4 Scalp Therapy Conditioner and the Scalp & Hair Treatment to target fullness over time.

• Use on wet hair, massage into scalp for one minute, then rinse.
• Pair with System 4 conditioner and treatment for a three-part regimen.
• Daily use supports visible improvements in fullness within weeks.

What ingredients support scalp health and hair resilience?

The formula includes niacinamide and biotin-supporting ingredients combined with antioxidants and UV-protective elements to nourish the scalp and strengthen hair. These components work together to reduce breakage and support the appearance of thicker, fuller hair without aggressive chemicals.

• Niacinamide helps support scalp comfort and circulation.
• Biotin-associated ingredients aid in strengthening hair strands.
• Antioxidants and UV-protective additives help defend hair color and integrity.

Who is this for: Nioxin System 4 Scalp + Hair Shampoo is aimed at people with dry, color-treated or chemically processed hair that is experiencing progressed thinning and reduced density. It suits users looking for a salon-quality, daily cleanser that balances scalp care with color protection, and who plan to use a coordinated three-step Nioxin system (cleanser, conditioner, and treatment) to amplify hair structure and support fuller-looking results.

Ingredients

Aqua, Sodium Laureth Sulfate, Sodium Lauryl Sulfate, Citric Acid, Sodium Chloride, PPG-2 Hydroxyethyl Coco/Isostearamide, Sodium Citrate, Sodium Xylenesulfonate, Sodium Benzoate, Salicylic Acid, Sodium Hydroxide, Tetrasodium EDTA, Mentha Piperita Oil, Mentha Arvensis Leaf Oil, Menthol, Trisodium Ethylenediamine Disuccinate, Methylparaben, Polyquaternium-10, Propylene Glycol, Camellia Sinensis Leaf Extract, Cystine Bis-PG-Propyl Silanetriol, Biotin, Lecithin, Niacinamide, Panthenol, Tocopheryl Acetate, Foeniculum Vulgare Fruit Extract, Sodium Acetate, Isopropyl Alcohol, CI 19140, Faex Extract, Acer Saccharum Extract, Citrus Limon Peel Extract, Saccharum Officinarum Extract, Vaccinium Myrtillus Leaf Extract, CI 42090, Citrus Aurantium Dulcis Fruit Extract, CI 17200, Potassium Sorbate