NIOXIN System 4 Scalp + Hair Conditioner — 16.9 fl oz for Colored, Damaged Hair | Niacinamide & Biotin, Lightweight Density-Boosti

NIOXIN System 4 Scalp + Hair Conditioner is a lightweight, density-protecting conditioner formulated to moisturize colored, damaged hair while supporting a healthier scalp and fuller-looking strands.

This conditioner is the second step in NIOXIN’s three-part scalp therapy regimen, created to strengthen hair fibers, help retain moisture balance, and improve hair resilience for those experiencing progressed thinning. It blends BioAMP technology with targeted ingredients like niacinamide and biotin to condition hair without weighing it down, leaving color-treated strands softer and appearing thicker over time.

How does this conditioner support color-treated hair?

The formula is designed to protect and condition color-treated hair while enhancing strand strength to reduce breakage. It balances moisture so hair looks smoother and color vibrancy stays intact without heavy residue.

• Lightweight moisturizers that won’t strip color or weigh hair down
• Ingredients to help reinforce hair structure and reduce fragility
• Rinse-off formula that helps maintain salon color between services

What results can I expect for thinning or damaged hair?

Regular use promotes the appearance of thicker, fuller hair by strengthening weakened strands and improving manageability. Many users report improved density appearance and better fullness within weeks when used as part of the full NIOXIN System 4 routine.

• Designed specifically for progressed thinning and damaged, color-treated hair
• Helps reduce breakage to preserve hair length and volume
• Clinical-style results when used consistently with System 4 shampoo and treatment

How should I use NIOXIN System 4 Conditioner for best results?

Apply after cleansing with the matching System 4 Cleanser Shampoo. Distribute evenly across the scalp and hair, leave in for 1–3 minutes, then rinse thoroughly; daily use is recommended as part of the three-step regimen for optimal outcome.

• Step 1: Cleanse with NIOXIN System 4 shampoo
• Step 2: Apply conditioner to scalp and hair, leave 1–3 minutes, rinse
• Step 3: Follow with NIOXIN Scalp & Hair Treatment for enhanced density appearance

Which active ingredients contribute to performance?

The conditioner includes niacinamide and biotin along with NIOXIN’s BioAMP technology to help amplify hair structure and retain moisture balance. These components work together to nourish the scalp environment and strengthen each strand without heavy silicones.

• Niacinamide: supports scalp circulation and surface health
• Biotin: helps fortify hair structure to minimize breakage
• BioAMP technology: targets moisture balance and hair density appearance

Who is this for: NIOXIN System 4 Scalp + Hair Conditioner is intended for people with color-treated, dry or damaged hair experiencing progressed thinning who want a lightweight conditioner that supports scalp health and fuller-looking hair. It’s best used by anyone following the System 4 regimen or those aiming to strengthen and visibly thicken fragile colored strands without added weight.

Ingredients

Aqua, Cetyl Alcohol, Stearamidopropyl Dimethylamine, Stearyl Alcohol, Quaternium-18, Phenoxyethanol, Benzyl Alcohol, Cetearyl Alcohol, Hydroxypropyl Guar, Bis-Aminopropyl Dimethicone, Glyceryl Stearate, Oleyl Alcohol, Methylparaben, Propylparaben, Polysorbate 60, Mentha Piperita Oil, Mentha Arvensis Leaf Oil, Menthol, EDTA, Hydroxyethylcellulose, Citric Acid, Propylene Glycol, Camellia Sinensis Leaf Extract, Cystine Bis-PG-Propyl Silanetriol, Biotin, Lecithin, Niacinamide, Panthenol, Tocopheryl Acetate, Foeniculum Vulgare Fruit 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