NIOXIN Scalp & Hair Thickening Conditioner System 2 — 33.8 fl oz, Niacinamide & Biotin for Natural/Untreated Hair

Nioxin Scalp + Hair Thickening System 2 Conditioner is a lightweight, professional conditioner formulated to strengthen and visibly thicken natural or untreated hair experiencing progressed thinning.

This salon-grade conditioner is the second step in Nioxin’s three-part System 2 regimen, created to support scalp health while improving hair resilience and fullness. The formula combines BioAmp technology with niacinamide and biotin to help amplify hair structure, retain moisture balance, and minimize breakage from daily styling. Designed for natural or untreated hair with progressed thinning, the 33.8 fl oz (1 L) size is ideal for at-home use or placement in a professional setting.

How does this conditioner help hair look fuller?

The System 2 conditioner works by coating and fortifying the hair shaft, which creates a thicker-looking strand and improves overall texture. Ingredients such as BioAmp technology and biotin support hair strength so strands resist breakage and appear denser over time. Regular use as part of the three-step system enhances the visual effect of fullness.

• BioAmp technology amplifies hair structure for a fuller appearance
• Biotin helps strengthen strand integrity to reduce breakage
• Lightweight moisturizing agents avoid weighing hair down
• Visible improvement reported in consumer studies within 30 days

Will it improve scalp condition and why does that matter?

A balanced scalp provides a healthier foundation for hair to look its best. Nioxin System 2 conditioner supports scalp integrity by helping retain moisture balance and reducing residue that can accumulate after cleansing. Better scalp condition can make styling easier and help hair lay with more body and movement.

• Formulated to complement scalp-cleansing shampoo for cleaner follicles
• Moisture retention helps prevent dry, brittle ends and flaking
• Botanical extracts and antioxidants soothe and protect the scalp surface
• Non-greasy finish leaves the scalp feeling refreshed

How should I use this conditioner for best results?

Use System 2 conditioner after cleansing with the matching Nioxin System 2 Cleanser Shampoo. Distribute the conditioner across the scalp and through hair, leave on for 1–3 minutes, then rinse thoroughly. For consistent improvement, apply daily and follow the full three-step regimen including the Scalp & Hair Treatment.

• Apply after shampooing to damp hair and scalp
• Leave on 1–3 minutes to allow active ingredients to work
• Rinse well and style as usual; follow with System 2 treatment
• Daily use recommended for ongoing scalp health and fullness

Is this product suitable for color-treated or chemically processed hair?

Nioxin System 2 is formulated specifically for natural or untreated hair with progressed thinning, so it is optimized for hair that hasn’t been permed or chemically altered. If your hair is color-treated or chemically processed, consult product details or a stylist to confirm compatibility and choose the appropriate Nioxin system.

• Designed for natural or untreated hair with progressed thinning
• Check with a professional if you have chemical treatments
• Use the matching System kit for best coordinated results

Who is this for? Nioxin System 2 Scalp + Hair Thickening Conditioner is intended for people with natural or untreated hair experiencing progressed thinning who want a lightweight, salon-grade conditioner that supports scalp balance and helps hair appear thicker. It’s well suited for daily at-home use, stylists who need a professional-sized bottle, and anyone following the Nioxin three-step program seeking visible improvements in texture and fullness.

Ingredients

Aqua, Cetyl Alcohol, Stearamidopropyl Dimethylamine, Stearyl Alcohol, Quaternium-18, Phenoxyethanol, Benzyl Alcohol, Cetearyl Alcohol, Hydroxypropyl Guar, Glyceryl Stearate, Hydroxyethylcellulose, Oleyl Alcohol, Methylparaben, Propylparaben, Polysorbate 60,Mentha Piperita Oil, Mentha Arvensis Leaf Oil, Menthol, Bis-Aminopropyl Dimethicone, EDTA, Propylene Glycol, Citric Acid, 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, Faex Extract, Acer Saccharum Extract, Citrus Limon Peel Extract, Saccharum Officinarum Extract, Vaccinium Myrtillus Leaf Extract, Citrus Aurantium Dulcis Fruit Extract, CI 42090, Potassium Sorbate, Sodium Benzoate