---
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: "433 Lei"
currency: RON
in_stock: true
reviews_count: 13
category: "Nioxin"
url: https://www.desertcart.ro/products/1157428-system-4-scalp-care-hair-thickening-leave-in-treatment-colored
store_origin: RO
region: Romania
---

# 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:** 433 Lei
**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?** 433 Lei with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.ro](https://www.desertcart.ro/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

desertcart.com: Nioxin System 4 Scalp + Hair Thickening Treatment | Serum for Colored or Damaged Hair with Progressed Thinning | 6.8 Fl oz. : Beauty & Personal 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.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN  | B0054Y0PMK |
| Best Sellers Rank | #13,980 in Beauty & Personal Care ( See Top 100 in Beauty & Personal Care ) #42 in Scalp Treatments |
| Customer Reviews | 4.4 4.4 out of 5 stars (2,659) |
| Department  | Women's Hair Care |
| Is Discontinued By Manufacturer  | No |
| Item model number  | 81629325 |
| Manufacturer  | Nioxin |
| Product Dimensions  | 2.31 x 1.85 x 7.5 inches; 6.81 ounces |
| UPC  | 070018042606 |

## Product Details

- **Brand:** NIOXIN
- **Item Form:** Cream
- **Scent:** Peppermint Oil
- **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.

---

## Why Shop on Desertcart?

- 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016
- 🌍 **Shop Globally** — Access 737+ million products across 21 categories
- 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price
- 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members)
- 🔒 **Secure Payments** — Trusted payment options with buyer protection
- ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews

**Shop now:** [https://www.desertcart.ro/products/1157428-system-4-scalp-care-hair-thickening-leave-in-treatment-colored](https://www.desertcart.ro/products/1157428-system-4-scalp-care-hair-thickening-leave-in-treatment-colored)

---

*Product available on Desertcart Romania*
*Store origin: RO*
*Last updated: 2026-03-01*