NIOXIN Scalp + Hair Thickening System 1 Shampoo, 10.1 fl oz — For Natural Light Thinning, Niacinamide & Biotin

Nioxin Scalp + Hair Thickening System 1 Shampoo is a detoxifying cleanser formulated to remove buildup and support scalp health for natural, lightly thinning hair.

Designed for fine, non-chemically treated hair showing early signs of thinning, this 10.1 fl oz shampoo uses a blend of botanicals, humectants, niacinamide and biotin to cleanse without stripping natural oils. The formula targets residue from styling products, minerals and pollutants to clear nutrient pathways at the follicle level, helping hair appear thicker, fuller and more resilient when used as part of the Nioxin System 1 regimen.

How does this shampoo improve the scalp environment?

The cleanser removes impurities and excess sebum that can block follicles, creating a cleaner surface for healthy hair growth processes. It’s formulated to preserve essential oils so the scalp isn’t over-dried while clearing pathways for nutrients.

• Detoxifies: lifts product build-up, minerals and pollutants from scalp and hair.
• Preserves moisture: humectants maintain natural oil balance.
• Supports nutrient access: clears residue that can impede follicles.

Will I see thicker-looking hair and how quickly?

Visible improvements in hair body and density can appear with regular daily use as part of the complete System 1 routine. Clinical feedback and consumer studies show many users notice increased fullness and thickness within weeks when using the full kit (cleanser, conditioner, and treatment).

• Thickening effect reported by a majority of users in product studies.
• Formulated to increase hair fullness and resilience against breakage.
• Best results when paired with System 1 Scalp Therapy Conditioner and Scalp & Hair Treatment.

What are the key ingredients and their roles?

System 1 combines targeted actives and botanicals to cleanse and support hair structure without harsh stripping. Niacinamide and biotin are included alongside humectants and antioxidants to help promote a healthier scalp and improve hair manageability.

• Niacinamide: helps support scalp condition and surface health.
• Biotin: contributes to hair strength and overall hair appearance.
• Botanical blend and humectants: remove buildup while retaining moisture.

How should I use this shampoo for best results?

Apply to wet hair, massage gently into the scalp and hair, lather for about one minute, then rinse thoroughly. For optimal thickening and scalp improvement, follow with Nioxin System 1 Scalp Therapy Conditioner and Scalp & Hair Treatment as directed.

• Use daily for consistent scalp cleansing and buildup removal.
• Massage into scalp to clear follicles and stimulate circulation.
• Pair with the full System 1 regimen for maximum visible benefits.

Who is this for: Nioxin Scalp + Hair Thickening System 1 Shampoo is intended for people with natural or untreated fine hair experiencing light thinning who want a professional-strength, scalp-focused cleanser. It’s suitable for daily use and for anyone seeking to reduce residue, protect hair from breakage, and improve the look of fullness without chemical processing.

Ingredients

Aqua, Sodium Laureth Sulfate, Sodium Lauryl Sulfate, Cocamidopropyl Betaine, Sodium Citrate, Sodium Xylenesulfonate, Sodium Chloride, Cocamide MEA, Sodium Benzoate, Citric Acid, Salicylic Acid, Mentha Piperita Oil, Mentha Arvensis Leaf Oil, Menthol, Tetrasodium EDTA, Sodium Hydroxide, Methylparaben, Propylene Glycol, Camellia Sinensis Leaf Extract, Cystine Bis-PG-Propyl Silanetriol, Biotin, Lecithin, Niacinamide, Panthenol, Tocopheryl Acetate, Citrus Paradisi Peel Extract, Humulus Lupulus Flower Extract, Urtica Dioica Leaf Extract, CI 42090, Faex Extract, Acer Saccharum Extract, Citrus Limon Peel Extract, Saccharum Officinarum Extract, Vaccinium Myrtillus Leaf Extract, Citrus Aurantium Dulcis Fruit Extract, Potassium Sorbate