---
product_id: 1157428
title: "System 4 Scalp Care + Hair Thickening Leave-In Treatment for Colored, Dry & Damaged Hair with Progressed Thinning | Maintain Vibrant Color | Nourish & Boost Density with Niacinamide & Biotin"
brand: "nioxin"
price: "€ 80.13"
currency: EUR
in_stock: true
reviews_count: 8
category: "Nioxin"
url: https://www.desertcart.fr/products/1157428-system-4-scalp-care-hair-thickening-leave-in-treatment-colored
store_origin: FR
region: France
---

# Niacinamide & Biotin boost density 85% thicker hair effect UV protection & scalp cleansing System 4 Scalp Care + Hair Thickening Leave-In Treatment for Colored, Dry & Damaged Hair with Progressed Thinning | Maintain Vibrant Color | Nourish & Boost Density with Niacinamide & Biotin

**Brand:** nioxin
**Price:** € 80.13
**Availability:** ✅ In Stock

## Summary

> 🌿 Unlock your hair’s full potential—thicker, healthier, and color-brilliant every day!

## Quick Answers

- **What is this?** System 4 Scalp Care + Hair Thickening Leave-In Treatment for Colored, Dry & Damaged Hair with Progressed Thinning | Maintain Vibrant Color | Nourish & Boost Density with Niacinamide & Biotin by nioxin
- **How much does it cost?** € 80.13 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.fr](https://www.desertcart.fr/products/1157428-system-4-scalp-care-hair-thickening-leave-in-treatment-colored)

## Best For

- nioxin enthusiasts

## Why This Product

- Trusted nioxin brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Color-Safe Formula:** Protects and maintains vibrant color while strengthening hair resilience against breakage.
- • **Award-Winning Trust:** 16 years as Behind the Chair Stylist Choice Winner—join the community that professionals rely on.
- • **Advanced Scalp Health:** Gentle cleansing removes impurities and excess sebum, creating the perfect environment for hair growth.
- • **Nourishing Botanical Blend:** Infused with antioxidants and peppermint oil for a refreshing, revitalized scalp experience.
- • **Clinically Proven Thickness:** 85% of users see thicker, fuller hair in just 30 days—because your hair deserves to stand out.

## Overview

NIOXIN System 4 Leave-In Treatment is a professional-grade, color-safe formula designed for dry, damaged hair with progressed thinning. Clinically proven to increase hair thickness and density by over 80%, it nourishes the scalp with niacinamide, biotin, and antioxidants while protecting hair color and reducing breakage. Trusted by stylists for 16 years, this lightweight treatment refreshes and strengthens hair, delivering visible results in just 30 days.

## Description

Product Description PROTECT and REFRESH the scalp with NIOXIN’s three part System 4 Scalp & Hair Treatment for Colored Hair with Progressed Thinning. This diameter-increasing leave-in hair and scalp treatment is particularly formulated for colored hair with progressed thinning. NIOXIN’s Scalp and Hair Treatment is the final step of a three part System, designed to strengthen the hair and amplify hair structure. PROFESSIONAL HAIR AND SCALP THICKENING TREATMENT for Colored Hair with progressed thinning Helps prevent hair loss due to breakage, providing a refreshed scalp environmentProfessional quality treatment to increase hair diameter for colored hair with progressed thinningScalp Access Delivery System 2.0 helps to provides thicker hair and contains UV-protection ingredients for the hairAward: Behind the Chair Stylist Choice Winner Favorite Thinning Haircare, 16 consecutive yearsNIOXIN’s Scalp and Hair Leave-in Treatment is the third step of a three part NIOXIN regimen, designed to strengthen the hair and amplify hair structureUse in combination with NIOXIN System 4 Cleanser Shampoo and Scalp Therapy ConditionerEnroll in Subscribe and Save to ensure you never run out! About NIOXIN NIOXIN is the only salon brand with 25+ years of experience in THINNING HAIR. NIOXIN, supported by The Institute of Trichologists, believes SCALP HEALTH is an extension of facial skin and requires the same attention and care.

Review: Love - Love, helped with my hair loss and thickened my hair. I use the Nioxin shampoo, conditioner, mousse, and scalp care. Also, I take hair vitamins.
Review: Get the complete set.. its amazing! - I purchased this product because after menopause I noticed I was losing a lot of hair when I would dry my hair after showering. My daughter had purchased the same product, except system #2, for my 75 year old mother just months before. I saw great results with my mothers hair growth and the end of her hair loss. I love the minty smell and the slight cooling tingling feeling I get while washing. Your hair feels very clean after shampooing. After I wash I apply the conditioner, which makes your hair very soft and healthy looking. I then spray on the Nioxin system 4 scalp spray and leave it on without rinsing. Love the continued tingle and cooling from the product. I then just stole as normal. I have noticed even after just a few washingseconds that the hair loss has lessened. I don't look like I have adopted a small black dog any longer (after drying my hair from hair loss) Ha ha I love this product and will continue to order it.

## Features

- 85% of consumers noticed a thickening effect, 80% noticed an increase in hair density, 80% noticed an increase in hair fullness
- Thickens the hair: Nioxin System Kit 4 is clinically designed to add thickness and fullness to dry, damaged, color-treated hair with progressed thinning, with visible results in just 30 days.
- Supports scalp health: The advanced formula of Nioxin System Kit 4 gently cleanses the scalp, removing impurities and excess sebum that can clog hair follicles, creating a healthier environment for the scalp.
- Reduces hair thinning: By strengthening hair resilience, Nioxin System Kit 2 helps minimize hair breakage, promoting the appearance of fuller, thicker hair while protecting the hair color.
- Nourishes the scalp: Infused with nourishing botanicals, antioxidants, and UV protecting ingredients, this kit's Scalp + Hair Thickening Treatment can nourish and revitalize the scalp, improving its overall health and condition.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B0054Y0PMK |
| Active Ingredients | Nicotinate |
| Best Sellers Rank | #12,577 in Beauty & Personal Care ( See Top 100 in Beauty & Personal Care ) #37 in Scalp Treatments |
| Brand | NIOXIN |
| Brand Name | NIOXIN |
| Container Type | Bottle |
| Customer Reviews | 4.4 out of 5 stars 2,650 Reviews |
| Global Trade Identification Number | 00070018042606 |
| Item Form | Cream |
| Item Height | 7.5 inches |
| Item Volume | 6.8 Fluid Ounces |
| Item Weight | 193 Grams |
| Manufacturer | Nioxin |
| Product Benefits | The lightweight formula adds moisture, shine and body to your hair, making it look thicker and fuller. Product Benefits The lightweight formula adds moisture, shine and body to your hair, making it look thicker and fuller. See more |
| Scent | Peppermint Oil |
| Scent Name | Peppermint Oil |
| Skin Type | All |
| Special Ingredients | Lecithin |
| Target Use Body Part | Head |
| UPC | 070018042606 |
| Unit Count | 6.8 Fluid Ounces |

## Product Details

- **Item Form:** Cream
- **Scent:** Peppermint Oil
- **Brand:** NIOXIN
- **Product Benefits:** The lightweight formula adds moisture, shine and body to your hair, making it look thicker and fuller.
- **Skin Type:** All

## Images

![System 4 Scalp Care + Hair Thickening Leave-In Treatment for Colored, Dry & Damaged Hair with Progressed Thinning | Maintain Vibrant Color | Nourish & Boost Density with Niacinamide & Biotin - Image 1](https://m.media-amazon.com/images/I/61rtLuCDPQL.jpg)

## Available Options

This product comes in different **Size** options.

## Questions & Answers

**Q: What is the expiration date of this product being sold by Gold Fulfillment?**
A: I looked it up in frequently asked questions in the Nixon site. The product has a 36 month shelf life. And it is effective for 12 months once opened

**Q: What does200 MI mean?**
A: It's 200 ML (milliliters) which is equal to 6.76 FL (fluid ounces) the amount in the bottle

**Q: Can you use this with hair booster Nixon treatment also?  If so, which first? Or does it matter?**
A: I answered wrong the first time. I shake the bottle and then it foams, and I mix it over my scalp. No more hair loss! Yes, I use it first after showering.

**Q: Does this nioxin system 4 treatment have an spf in it?**
A: Hello, the packaging says it has a UV defense for your hair, but no mention of an spf for your scalp. I am very fair, have very thin baby hair, and live in a high altitude. I haven't had much of a problem and I have used it for about 5 years. I hope this helps. Regards, Ellen

## Customer Reviews

### ⭐⭐⭐⭐⭐ Love
*by T***O on October 21, 2025*

Love, helped with my hair loss and thickened my hair. I use the Nioxin shampoo, conditioner, mousse, and scalp care. Also, I take hair vitamins.

### ⭐⭐⭐⭐⭐ Get the complete set.. its amazing!
*by N***G on September 13, 2016*

I purchased this product because after menopause I noticed I was losing a lot of hair when I would dry my hair after showering. My daughter had purchased the same product, except system #2, for my 75 year old mother just months before. I saw great results with my mothers hair growth and the end of her hair loss. I love the minty smell and the slight cooling tingling feeling I get while washing. Your hair feels very clean after shampooing. After I wash I apply the conditioner, which makes your hair very soft and healthy looking. I then spray on the Nioxin system 4 scalp spray and leave it on without rinsing. Love the continued tingle and cooling from the product. I then just stole as normal. I have noticed even after just a few washingseconds that the hair loss has lessened. I don't look like I have adopted a small black dog any longer (after drying my hair from hair loss) Ha ha I love this product and will continue to order it.

### ⭐⭐⭐⭐⭐ It works!
*by C***N on October 16, 2025*

I’ve been having breakage and thinning hair over the last year. This product just in three months has helped my hair become stronger and a lot more volume!!!

## Frequently Bought Together

- Nioxin System 4 Scalp Care + Hair Thickening Leave-In Treatment For Colored, Dry, & Damaged Hair with Progressed Thinning Nourish & Boost Hair Density with Niacinamide & Biotin
- Nioxin Density Defend Styling Root Lifting Spray | Hair Thickening Spray | Texturizes and Volumizes | 5.1 Fl oz.
- Nioxin Hair Fall Defense Intensive Daily Leave-In Hair Treatment | With Niacinamide, Caffeine, Lauric Acid, and Sandalore | For Thicker, Stronger Hair | 2.3 Fl Oz.

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*Product available on Desertcart France*
*Store origin: FR*
*Last updated: 2026-01-25*