Nioxin Scalp & Hair Leave-In Treatment System 4 is a professional thickening treatment for color-treated hair with progressed thinning. This leave-in formula is designed to provide fuller-looking hair while protecting color. Key Benefits: Volumizing scalp and hair treatment for color-treated hair with progressed thinning Helps provide thicker-looking hair by increasing the fullness of each strand Moisturizes hair and scalp Increases hair resilience and moisture balance Amplifies hair texture while protecting against breakage This leave-in treatment is the final step of the Nioxin System 4 regimen. It uses advanced technology to increase the appearance of hair fullness and diameter. The formula nourishes the scalp and strengthens hair against damage, while helping to maintain color vibrancy. Ingredients 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. Suggested Use Shake well before use Apply evenly to entire scalp after shampooing and conditioning Gently massage into scalp Do not rinse Style as desired Use daily for best results Note: May cause temporary redness to scalp after application. This is normal and should subside quickly.