What is this product and who is it for?

This is a leave-on serum designed for dry, damaged, colored hair with light thinning. It aims to strengthen each strand from within and add thickness and fullness as part of the System 3 regimen.

How do I use this serum correctly?

Apply directly to the scalp on towel-dried hair, focusing on areas of concern. Shake well, massage to distribute, and do not rinse out. Use with Nioxin System 3 Shampoo and Conditioner for best results.

What should I expect in terms of results?

Users report a thicker appearance and increased fullness with continued use. The product is designed to improve hair resilience and balance the scalp environment over time.

Are there any safety precautions?

Test on a small skin area before first use. Do not ingest. Keep away from children and discontinue if irritation occurs.

What are the main active components and their roles?

Niacinamide supports scalp health, Biotin nourishes the hair root, and Caffeine stimulates hair follicles. Together, they help nourish, strengthen, and improve the look of fullness.

Nioxin Scalp Thickening Serum System 3 100 mL

$39.99

Shipping to the United States

Processing: 1–3 business days Delivery: 5–10 business days

Nioxin System 3 Scalp + Hair Thickening Treatment serum for dry, damaged hair with light thinning, 100 mL. Strengthens strands and adds fullness with a lightweight formula.

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The Nioxin System 3 Scalp + Hair Thickening Treatment is a leave-on serum designed for dry, damaged, colored hair with light thinning. It helps nourish the hair from within and supports thicker, fuller-looking strands. This product is formulated to balance the scalp and improve hair feel, using a targeted blend of ingredients to support your natural hair during styling and everyday wear.

Benefits at a glance

Thickens the hair: Clinically oriented system 3 adds thickness and fullness to hair with light thinning, with visible results in about 30 days.
Supports scalp health: The advanced formula gently cleanses and balances the scalp environment for healthier follicle conditions.
Reduces hair thinning appearance: Strengthens resilience to help minimize breakage and enhance fullness while protecting color.
Nourishes the scalp: Botanic and antioxidant components revitalize the scalp for improved overall condition.
Adds moisture and shine: Lightweight serum leaves hair with improved moisture balance and natural sheen.

Key ingredients and why they matter

Niacinamide — supports healthy scalp function and can help maintain skin barrier integrity around hair follicles.
Biotin — contributes to the nourishment of hair roots and may support hair strength from the inside.
Caffeine — provides stimulation to the hair follicles and contributes to hair strength and vitality.
Vital botanical extracts and antioxidants — nourish the scalp and help revitalize overall scalp health.

Usage details and suitability

To use, apply the Scalp + Hair Thickening Treatment directly to towel-dried hair, focusing on the scalp and areas of concern. Massage gently to ensure even distribution. Do not rinse out. Style as desired.
For best results, use alongside Nioxin System 3 Scalp + Hair Shampoo and Conditioner.
Safety: test on a small area first to monitor for irritation. Keep out of reach of children.

The product helps create a healthier scalp environment and provides a lightweight boost to hair thickness and fullness. It is designed for individuals with dry, damaged, color-treated hair experiencing light thinning who are seeking a non-rinse leave-on option as part of a complete System 3 regimen.

Disclaimer: This product is not intended to diagnose, treat, cure, or prevent any disease. Always read and follow the product label. Consult a healthcare professional if you have any health concerns.