Nioxin Scalp + Hair Thickening System 4 Leave On Treatment

Hair Care • Foam

$26

30% Off with code FALL30

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Product Benefits

Creates the appearance of fuller, denser hair by increasing strand volume and improving hair body from root to tip
Helps fortify fragile, thinning hair and reduce breakage for healthier-looking strands over time
Enhances the strength and structure of chemically treated and color-damaged hair, making it more resistant to daily stressors
Nourishes the scalp with antioxidant-rich botanicals, helping to maintain a balanced and healthy scalp environment that supports hair growth

Expert Review

Includes UV filters to defend hair and scalp from sun exposure and environmental aggressors that can cause damage and dryness.

Size

3.3 fl oz

6.7 fl oz

Packs

1 Pack

2 Pack

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Product variants

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Nioxin Scalp + Hair Thickening System 4 Leave-On Treatment is a lightweight, leave-in formula specifically developed to help strengthen and boost the appearance of thinning hair, especially for those with color-treated or chemically processed strands. Expertly crafted to support the needs of dry, damaged hair, this treatment enhances volume and body while nourishing the scalp environment. It works by fortifying each strand at the root to reduce breakage and improve density, leaving hair looking fuller, thicker, and more resilient with daily use. Ideal as the final step in the System 4 regimen, it absorbs quickly without leaving buildup or residue.

Aqua/Water/Eau, Niacinamide, Phenylbenzimidazole Sulfonic Acid, Caffeine, Polysorbate 20, Benzophenone-4, Phenoxyethanol, Sodium Benzoate, PEG-12 Dimethicone, Benzyl Alcohol, Sodium Hydroxide, Cocamidopropyl Betaine, Acetamide MEA, Tetrasodium EDTA, Propylene Glycol, Methyl Nicotinate, Mentha Arvensis Leaf Oil, Parfum/Fragrance, Polysorbate 80, Polysorbate 60, PEG-23M, Mentha Piperita (Peppermint) Oil, Limonene, Camellia Sinensis Leaf Extract, Cystine Bis-PG-Propyl Silanetriol, Lecithin, Tocopheryl Acetate, Biotin, Foeniculum Vulgare (Fennel) Fruit Extract, Silica, Citrus Limon (Lemon) Peel Extract, Saccharum Officinarum/Sugar Cane Extract/Extrait de canne à sucre, Acer Saccharum (Sugar Maple) Extract, Vaccinium Myrtillus Leaf Extract, Citric Acid, Faex Extract/Yeast Extract/Extrait de levure, Propylparaben, Citrus Aurantium Dulcis (Orange) Fruit Extract, Maltodextrin, Methylparaben, Potassium Sorbate, Ethylparaben, Butylparaben, BHT.

To apply the Nioxin Scalp + Hair Thickening System 4 Leave-On Treatment, first shake the bottle well. After cleansing and conditioning your hair with the matching System 4 shampoo and conditioner, apply the treatment evenly across your entire scalp, focusing on areas showing signs of thinning. Gently massage it in with your fingertips and do not rinse out. Style your hair as usual. This treatment is designed for daily use and should be applied to damp hair for best results.

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