NIOXIN Scalp + Hair Thickening Leave-In Treatment — System 2 for Natural Hair, Strengthens & Reduces Breakage

Nioxin System 2 Scalp + Hair Thickening Treatment is a leave-in formula designed to refresh the scalp and strengthen natural hair with progressed thinning.

Built as the final step in Nioxin's three-part System 2, this leave-in treatment delivers targeted nutrients, antioxidants and botanicals to the scalp to support a healthier scalp environment and improve hair resilience. It pairs with the System 2 Cleanser Shampoo and Scalp Therapy Conditioner and uses Nioxin's Scalp Access 2.0 technology to reduce breakage and help hair appear fuller without rinsing out.

How does this treatment improve scalp condition?

The formula focuses on nourishing the scalp and removing substances that can interfere with hair health, creating a more balanced surface for new growth to appear. It is applied directly to the scalp and massaged in, leaving protective and calming ingredients to work between washes.

• Targets excess sebum and impurities that can clog follicles
• Delivers antioxidants and botanicals to soothe and fortify the scalp
• Contains UV-protecting components to guard hair and scalp from environmental stress

Will this help hair look thicker and reduce breakage?

System 2 is formulated to amplify hair structure and strengthen strands, which reduces the appearance of thinning caused by breakage. Consumer findings show noticeable improvements in thickness, density and fullness when used as directed as a complete three-step regimen.

• Clinically designed to add thickness and fullness within visible timelines
• Strengthens weakened strands to decrease breakage
• Works best when used daily and combined with System 2 shampoo and conditioner

How do I use the Nioxin Scalp + Hair Thickening Treatment?

Apply the leave-in treatment directly to a dry or towel-dried scalp across the entire head, gently massage to distribute, and leave it in—do not rinse. Use it every day as part of the System 2 routine for consistent maintenance and the best cosmetic results.

• Apply to roots and scalp, then massage gently until absorbed
• Do not rinse; leave in to provide ongoing protection and nourishment
• Pair with System 2 Cleanser Shampoo and Scalp Therapy Conditioner for optimal effects

What results can I expect and when?

While individual outcomes vary, many users notice improvements in thickness, density and fullness when the complete System 2 regimen is used consistently. The product is designed to support visible changes over weeks of regular use rather than immediate hair growth guarantees.

• 85% of consumers reported a thickening effect in user studies
• 80% noticed increased hair density and fullness in trial groups
• Best results appear with daily use and continuity of the three-step system

Who is this for: Nioxin System 2 Scalp + Hair Thickening Treatment is formulated for people with natural hair experiencing progressed thinning who want a salon-grade, leave-in option to fortify strands and improve scalp condition. It suits those committed to a daily care routine and who plan to use the complete System 2 pairing (cleanser, conditioner, treatment) to maximize cosmetic thickening and scalp support.

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