NIOXIN Scalp & Hair Thickening Conditioner System 1 — 33.8 fl oz Lightweight, Niacinamide + Biotin

Nioxin System 1 Scalp Therapy Conditioner is a lightweight, professional conditioner formulated to strengthen natural or untreated hair with light thinning while helping maintain scalp balance.

This 33.8 fl oz conditioner is the second step in the Nioxin System 1 regimen, created to support scalp health and amplify the appearance of hair density. The formula combines BioAMP technology with key actives like niacinamide and biotin to reinforce hair structure, reduce breakage risk, and help hair look fuller without weighing fine strands down. It’s designed for daily use after the matching cleanser and before the scalp and hair treatment to complete a three-step routine.

How does this conditioner help hair feel stronger without heaviness?

The conditioner delivers moisture and resilience through a lightweight blend that conditions the hair shaft without coating it. BioAMP technology works to amplify hair structure so strands feel firmer while niacinamide and biotin support cuticle integrity. Because it rinses cleanly, it avoids the buildup that can flatten fine hair.

• Lightweight moisturizing that won’t weigh down fine or natural hair
• BioAMP technology to enhance hair structure for a fuller look
• Niacinamide and biotin to support hair strength and manageability
• Rinses clean to maintain volume and scalp clarity

What results can I expect and how soon?

Users commonly report improved fullness and thicker-feeling hair with consistent use as part of the three-step System 1 program. Visible improvements in hair density and body have been observed within weeks when the conditioner is used with the Nioxin shampoo and scalp treatment. Results depend on individual hair condition and adherence to daily application.

• Designed to complement System 1 shampoo and scalp treatment
• Clinically designed to add thickness and fullness for natural, lightly thinning hair
• Typically reported improvements in look and feel with regular use

How do I use Nioxin System 1 Conditioner for best effect?

After cleansing with the System 1 Cleanser Shampoo, apply the conditioner across the scalp and through the hair. Leave it on for 1–3 minutes, then rinse thoroughly. For consistent benefits, incorporate this step into your daily routine and follow with the Scalp and Hair Treatment from the same system.

• Use daily after System 1 shampoo for best results
• Apply to scalp and hair, leave 1–3 minutes, rinse well
• Follow with System 1 Scalp and Hair Treatment to complete regimen

Which ingredients are key and what do they do?

The formula centers on BioAMP technology to thicken hair appearance while niacinamide (vitamin B3) and biotin support scalp and strand resilience. Nourishing botanicals and antioxidants help condition the scalp environment and reduce the appearance of breakage. The result is a conditioning product focused on density protection rather than heavy smoothing.

• BioAMP technology for amplified hair structure
• Niacinamide and biotin for scalp and strand support
• Botanicals and antioxidants to nourish the scalp environment

Who is this for: Nioxin System 1 Scalp Therapy Conditioner is intended for people with natural or untreated hair experiencing light thinning who want a salon-grade, lightweight conditioner that supports scalp health and the appearance of fuller hair. It suits daily users seeking a density-protecting step compatible with Nioxin’s three-part System 1 regimen and those preferring formulas that strengthen without heavy buildup.

Ingredients

Aqua, Cetyl Alcohol, Stearamidopropyl Dimethylamine, Quaternium-18, Stearyl Alcohol, Bis-Aminopropyl Dimethicone, Hydroxyethylcellulose, Phenoxyethanol, Benzyl Alcohol, Cetearyl Alcohol, Mentha Piperita Oil, Mentha Arvensis Leaf Oil, Menthol, Glyceryl Stearate, Oleyl Alcohol, Methylparaben, PEG-2M, Propylparaben, Polysorbate 60, EDTA, Propylene Glycol, Citric Acid, Limonene, Camellia Sinensis Leaf Extract, Silica, 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, BHT, 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