NIOXIN System 4 Scalp + Hair Shampoo 16.9 fl oz — Color-Safe for Thinning, Damaged Color-Treated Hair

Nioxin System 4 Scalp + Hair Shampoo is a color-safe cleanser formulated to gently remove buildup and support thicker-looking hair for dry, damaged, color-treated scalps with progressed thinning.

Designed as the first step in Nioxin’s three-part haircare regimen, System 4 prepares hair and scalp for targeted thickening treatments. The formula combines Pro-Color Shield and Activ Renewal technologies to lift sebum, styling residues, and environmental debris while protecting hair color and improving manageability. Clinically and dermatologically tested, this cleanser aims to leave hair feeling lighter, appearing fuller, and ready for the follow-up conditioner and scalp treatment.

How does this shampoo address buildup without stripping color?

The shampoo uses a balanced cleansing system that targets follicle-clogging oils and external residues but is formulated to be gentle on dyed hair. Pro-Color Shield helps preserve tone and gloss while Activ Renewal works at the scalp level to remove materials that flatten hair strands.

• Removes excess sebum, fatty acids, and environmental residue
• Maintains color vibrancy with color-friendly surfactants
• Leaves hair less weighed down for improved body

What results can I expect and how soon?

Visible improvements in hair fullness and manageability are commonly reported with consistent use as part of the System 4 kit. Clinical consumer feedback indicates many see a thickening effect and increased density within weeks when shampoo, conditioner, and treatment are used together.

• Perceptible thicker-looking hair with routine use
• Better hair resilience and reduced breakage over time
• Works best when paired with System 4 conditioner and scalp treatment

How should I use Nioxin System 4 for best results?

Apply to wet hair, massage gently into the scalp and hair for about one minute, then rinse thoroughly. Daily use is recommended as the initial step in the three-part regimen; follow with the System 4 Scalp Therapy Conditioner and Scalp & Hair Treatment for a complete routine.

• Use daily on wet hair; lather for one minute before rinsing
• Follow with System 4 conditioner and treatment for optimal effect
• Suitable for salon-strength routines and at-home maintenance

What key ingredients support scalp and strand health?

System 4 blends ingredients like niacinamide and biotin with botanical extracts and antioxidants to help nourish the scalp and support hair structure. The formula focuses on clearing the scalp environment and reinforcing hair to improve the appearance of fullness without harsh detergents.

• Niacinamide to help support scalp condition and circulation
• Biotin to help strengthen and improve hair manageability
• Botanical extracts and UV-protecting agents to nourish and shield color-treated hair

Who is this for: Nioxin System 4 Scalp + Hair Shampoo is made for people with dry, damaged, color-treated hair experiencing progressed thinning who want a salon-level, color-safe cleanser. It is ideal for those seeking a targeted scalp-first approach to improve hair appearance when used alongside matching conditioner and topical treatments.

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