NIOXIN Thickening Shampoo System 4 — Color-Protecting Scalp Cleanser for Damaged, Thinning Hair (300ml)

NIOXIN System 4 Thickening Shampoo is a professional scalp cleanser formulated to gently remove residue, protect color, and visibly amplify hair thickness for color-treated, damaged hair with progressed thinning.

NIOXIN System 4 is the first step in a targeted three-part regimen designed for color-treated hair showing advanced thinning. Combining Pro-Color Shield and Activ Renewal technologies, this shampoo cleanser focuses on scalp hygiene and lightweight conditioning to reduce follicle-clogging buildup while helping preserve hair color. Clinically and dermatologically tested, the formula prepares hair and scalp for the follow-up Scalp Therapy Conditioner and Scalp & Hair Treatment to support the appearance of fuller, stronger-looking hair.

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

NIOXIN System 4 removes sebum, fatty acids, and environmental residues that can block follicles and weigh hair down. By clearing buildup and lightly moisturizing, it creates a cleaner foundation so subsequent thickening products can work more effectively.

• Deep-cleansing formula lifts excess oils and pollutants from the scalp.
• Activ Renewal technology targets follicle-clogging residue for improved scalp clarity.
• Light hydration prevents dryness without leaving heavy buildup.
• Prepares strands to absorb conditioner and topical treatments more evenly.

Will this protect my color-treated, chemically treated hair?

Yes — Pro-Color Shield technology helps preserve salon color while cleansing. The shampoo is formulated to remove damaging residues without stripping color, helping maintain shade vibrancy alongside improved hair texture.

• Color-friendly cleansing avoids harsh stripping agents.
• UV-protecting ingredients help reduce environmental fading.
• Safe for chemically treated hair when used as directed.
• Pair with System 4 conditioner for best color and texture retention.

How quickly can I expect to notice fuller-looking hair?

Visible improvement depends on individual hair condition, but NIOXIN reports consumers seeing noticeable thickening and increased fullness within about 30 days when following the full system. Daily use of the cleanser as the first step in the three-part regimen consistently prepares hair to look denser over time.

• Daily application recommended: massage into wet hair, lather one minute, rinse thoroughly.
• Best results when used with Scalp Therapy Conditioner and Scalp & Hair Treatment.
• Clinically tested formulations show visible changes in consumer studies around 30 days.
• Consistent scalp care supports long-term improvement in hair appearance.

Is this suitable for dry, damaged hair with progressed thinning?

NIOXIN System 4 is specifically designed for dry, damaged, color-treated hair experiencing progressed thinning. The cleanser balances moisture and cleansing to reduce breakage risk while preparing fragile hair for strengthening treatments.

• Formulated for dry, chemically processed, and color-treated hair types.
• Helps reduce hair breakage by clearing residue that can weaken strands.
• Nourishing botanicals and antioxidants support scalp health.
• Use as part of the System 4 kit for a complete strengthening approach.

Who this is for: NIOXIN System 4 is for people with color-treated, chemically processed hair that is dry, damaged, and showing signs of progressed thinning. It’s aimed at anyone who wants a salon-grade scalp cleanser that protects hair color while improving scalp environment and supporting the appearance of thicker, fuller hair when used consistently with the matching NIOXIN System 4 conditioner and scalp treatment.

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