NIOXIN Thickening Shampoo System 2 for Natural or Untreated Hair — 16.9 fl oz, Niacinamide & Biotin

Nioxin System 2 Scalp + Hair Thickening Shampoo is a salon-grade cleanser formulated to remove buildup and boost the look of thickness in natural or untreated hair experiencing progressed thinning.

Nioxin’s System 2 shampoo is the first step in a targeted three-part regimen created for natural or untreated hair with visible thinning. The formula combines niacinamide, biotin-friendly support, and a cleansing complex to clear sebum, environmental residue, and styling deposits from the scalp and hair shaft, preparing strands to appear fuller and more resilient when paired with the matching conditioner and scalp treatment.

How does this shampoo improve the appearance of thin hair?

This cleanser works by removing substances that weigh hair down and obscure the scalp, so individual strands can sit with more lift and texture. It does not alter your natural hair pattern but creates a cleaner foundation that helps hair look denser and healthier when used consistently.

• Activ-Renewal technology lifts sebum, fatty acids, and environmental residue.
• Formulated to increase strand definition and improve hair body.
• Designed for daily use to maintain a clean scalp environment.

What key ingredients should I expect and what do they do?

The shampoo blends scalp-supportive and hair-strengthening components to promote a fuller look. Ingredients like niacinamide help maintain scalp condition while biotin-supportive elements contribute to hair resilience; antioxidants and UV protectants guard hair surface from external stressors.

• Niacinamide: supports scalp comfort and surface health.
• Biotin-friendly nutrients: help hair maintain strength and reduce breakage appearance.
• Antioxidants and UV filters: protect hair fiber from environmental damage.

How should I use Nioxin System 2 for best results?

Apply to wet hair, massage into the scalp and through lengths for about one minute, then rinse thoroughly; daily use is recommended. Best outcomes are achieved when the shampoo is used as step one in the complete System 2 routine—follow with the Scalp Therapy Conditioner and the Scalp & Hair Treatment.

• Use on wet hair, lather for one minute, rinse well each wash.
• Pair with System 2 conditioner and treatment for amplified results.
• Consistent, daily use helps sustain visible improvements in fullness.

What measurable benefits have users reported?

Independent consumer feedback and clinical testing have reported noticeable changes in hair fullness and density with regular System 2 use. While individual results vary, many users observe improved body and less visible thinning within weeks of daily application when following the full regimen.

• High percentage of users noticed thicker-looking hair and improved density.
• Designed to reduce breakage and fortify strand strength over time.
• Awarded professional recognition in thinning hair categories by stylists.

Who is this for: Nioxin System 2 Scalp + Hair Thickening Shampoo is intended for people with natural, untreated hair showing progressed thinning who want a professional-grade cleanser to reduce scalp buildup and enhance the appearance of fullness. It suits daily users seeking a targeted, salon-formulated first step in a three-part thickening routine without changing hair texture or color treatments.

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 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