NIOXIN Scalp + Hair Thickening System 2 Leave-In Treatment, 3.4 fl oz — Lightweight Fortifying Formula

NIOXIN Scalp + Hair Thickening System 2 Leave-In Treatment is a lightweight, leave-on formula designed to nourish the scalp and give natural, untreated hair the appearance of increased thickness and fullness.

This treatment is the final step in NIOXIN System 2, created for natural or untreated hair showing progressed thinning. The formula combines nutrients, antioxidants and botanical extracts to refresh the scalp environment, fortify hair fiber, and reduce the look of breakage without weighing hair down. It is intended to be used regularly after cleansing with the matching system to help support stronger-looking hair and a healthier-feeling scalp.

How does this leave-in treatment improve the look of thinning hair?

The product targets both scalp condition and hair strand strength to visually enhance density. By delivering fortifying ingredients to roots and lengths, it helps hair resist breakage and appear fuller over time when used consistently with the System 2 regimen.

• Deposit of lightweight thickening agents to create fuller visual texture
• Strengthening nutrients that help reduce hair breakage
• Botanical extracts and antioxidants to protect hair fiber from environmental stressors

What should I expect from daily use and how quickly will I see results?

Visible improvement in hair fullness and scalp condition is typically reported within weeks when combined with the three-step System 2 routine. Results vary by individual, but consistent application increases the chance of noticing thicker, healthier-looking hair.

• Designed as the leave-in final step after cleansing and treatment routines
• Lightweight finish that won’t leave residue or greasiness
• Many users report perceptible change in 30 days with regular use

How do I incorporate this treatment into my hair care routine?

Use this spray or leave-on serum after shampooing and conditioning with NIOXIN System 2 products. Apply directly to the scalp and work through to the lengths where needed, then style as usual—no rinse required.

• Apply to towel-dried or dry hair focusing on the scalp
• Massage gently to ensure even distribution at the roots
• Leave in; style with heat tools or air-dry as preferred

What ingredients and benefits are highlighted in the formula?

The treatment blends scalp-supporting botanicals, antioxidants and protective agents to nourish and shield both scalp and strands. The goal is to create a healthier environment for hair to look fuller and resist everyday damage that leads to breakage.

• Antioxidants protect hair from environmental aggressors
• Botanical extracts calm and nourish the scalp surface
• UV protection helps reduce sun-related color and fiber damage

Who is this for: NIOXIN Scalp + Hair Thickening System 2 Leave-In Treatment is aimed at people with natural or untreated hair experiencing progressed thinning who want a salon-developed, leave-on product to boost scalp health and the visual fullness of hair. It suits anyone looking for a lightweight, non-greasy finish that complements a targeted three-step thinning-hair regimen and helps reduce the appearance of breakage while improving manageability.

Ingredients

Water/Aqua, Phenylbenzimidazole Sulfonic Acid, Niacinamide, Benzophenone-4, Caffeine, Polysorbate 20, Sodium Hydroxide, Benzyl Alcohol, Sodium Benzoate, Phenoxyethanol, Peg-12 Dimethicone, Citric Acid, Cocamidopropyl Betaine, Acetamide Mea, Isopropyl C12-15-Pareth-9 Carboxylate, Propylene Glycol, Tetrasodium Edta, Methyl Nicotinate, Sodium Chloride, Parfum, Polysorbate 60, Polysorbate80, Mentha Piperita Oil, Menthol, Mentha Arvensis Leaf Oil, Peg-23m, Camellia Sinensis Leaf Extract, Limonene, Cystine Bis-Pg-Propyl Silanetriol, Biotin, Lecithin, Tocopheryl Acetate, Citrus Paradisi, Peel Extract, Humulus Lupulus Flower Extract, Urtica Dioica Leaf Extract, Silica, Faex extract, Acer Saccharum Extract, Citrus Limon Peel Extract, Saccharum Officinarum Extract, Vaccinum Myrtillus Leaf Extract, Citrus Aurantium Dulcis Fruit Extract, Potassium Sorbate