---
product_id: 257980866
title: "Fortifiant Leave-In"
brand: "kérastase"
price: "$194"
currency: NZD
in_stock: true
reviews_count: 5
url: https://www.desertcart.nz/products/257980866-fortifiant-leave-in
store_origin: NZ
region: New Zealand
---

# Arginine & Ginger Root boost Reduces breakage, strengthens hair 90ml potent daily serum Fortifiant Leave-In

**Brand:** kérastase
**Price:** $194
**Availability:** ✅ In Stock

## Summary

> 💥 Unlock stronger, healthier hair—because your roots deserve the best!

## Quick Answers

- **What is this?** Fortifiant Leave-In by kérastase
- **How much does it cost?** $194 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.nz](https://www.desertcart.nz/products/257980866-fortifiant-leave-in)

## Best For

- kérastase enthusiasts

## Why This Product

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

## Key Features

- • **Breakage Defense:** Significantly reduces hair fall caused by brushing and breakage
- • **Natural Growth Boost:** Infused with Arginine, Ginger Root Extract & Edelweiss Native Cells to stimulate healthy hair growth
- • **Visible Results Fast:** Users report softer, healthier hair and less breakage within just one week
- • **Silicone-Free Formula:** Nourishes hair without weighing it down or clogging pores
- • **Daily Fortifying Power:** A 90ml serum designed to strengthen weakened hair every day

## Overview

Fortifiant Leave-In is a 90ml daily serum by Kerastase formulated with Arginine, Ginger Root Extract, and Edelweiss Native Cells to strengthen weakened hair prone to breakage. This silicone-free treatment supports blood flow to hair roots, reduces hair fall from brushing, and promotes visible hair health improvements within a week.

## Description

A daily fortifying serum for weakened hair that is prone to falling due to breakage from brushing Formulated with Arginine, Ginger Root Extract & Edelweiss Native Cells Helps stimulate healthy hair growth by supporting strong blood ﬂow to the roots of hair cells Strengthens hair day after day while reducing breakage Unveils healthy & nourished hair Silicone-free

Review: رائع
Review: I love everything about this product! Pricey but sooooooo worth it!!!! Used as directed and within the first week I started noticing a difference. My hair is softer, way less breakage, hair looks healthier, helped the hair growth. Smells really good too. I wish I would’ve taken before and after pictures.

## Features

- 90ml/3.04oz

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B086TPQJTT |
| ASIN  | B086TPQJTT |
| Best Sellers Rank | #75,965 in Beauty ( See Top 100 in Beauty ) #340 in Hair Styling Serums |
| Customer reviews | 4.4 4.4 out of 5 stars (1,444) |
| Date First Available  | 6 April 2020 |
| Manufacturer | Kerastase |
| Manufacturer  | Kerastase |
| Manufacturer reference | 884486448149 |
| Manufacturer reference  | 884486448149 |
| Product Dimensions | 4.9 x 4.9 x 15.49 cm; 249 g |
| Product Dimensions  | 4.9 x 4.9 x 15.49 cm; 249 g |

## Product Details

- **Hair type:** All
- **Liquid volume:** 3 Fluid Ounces
- **Material type free:** Paraben Free
- **Product benefits:** Strengthening
- **Scent:** Unscented

## Images

![Fortifiant Leave-In - Image 1](https://m.media-amazon.com/images/I/31BRybf+ugL.jpg)
![Fortifiant Leave-In - Image 2](https://m.media-amazon.com/images/I/718vn8Sc7kL.jpg)
![Fortifiant Leave-In - Image 3](https://m.media-amazon.com/images/I/71N--p-kvOL.jpg)
![Fortifiant Leave-In - Image 4](https://m.media-amazon.com/images/I/71yhOvZrXiL.jpg)
![Fortifiant Leave-In - Image 5](https://m.media-amazon.com/images/I/819n5gqePTL.jpg)

## Questions & Answers

**Q: What is the fragrance in Serum Fortifiant Hair Serum?**
A: Inspired by the energy flowing from modern colognes, Genesis fragrance is a bright, invigorating scent of bergamot & a hint of aromatic green.

**Q: How often should I use Serum Fortifiant Hair Serum?**
A: For best results to strengthen weakened hair, we recommend using Serum Fortifiant Hair Serum daily after using a shampoo and conditioner or hair mask.

**Q: Should I use Serum Fortifiant Hair Serum on wet or dry hair?**
A: We recommend using Serum Fortifiant Hair Serum on damp, towel-dried scalp after cleansing with and treating with a conditioner or hair mask. After applying the hair serum, proceed to blow dry or let hair air dry. Do not rinse.

**Q: Should Serum Fortifiant Hair Serum be applied to the hair or scalp?**
A: Serum Fortifiant Hair Serum should be applied to the scalp in order to strengthen hair and prevent hair fall due to breakage from brushing. Apply to parts of the scalp where your hair needs the most strength and in areas where you notice less density

**Q: What is the difference between hair-fall and hair-loss?**
A: Hair-loss is defined by > 100 strands falling from the roots per day due to the hardening of collagen hair shaft. Hair-fall is defined by > 100 strands per day falling from the roots due to biological reasons (stress, hormones, diet) OR breakage.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Review
*by S***A on 13 August 2025*

رائع

### ⭐⭐⭐⭐⭐ Review
*by A***1 on 4 January 2026*

I love everything about this product! Pricey but sooooooo worth it!!!! Used as directed and within the first week I started noticing a difference. My hair is softer, way less breakage, hair looks healthier, helped the hair growth. Smells really good too. I wish I would’ve taken before and after pictures.

### ⭐⭐⭐⭐⭐ Review
*by R***A on 27 October 2025*

È un prodotto ottimo, mantiene le promesse. Effettivamente ho notato l' effetto di miglioramento sulla caduta dei capelli

## Frequently Bought Together

- Kerastase Genesis Hair Serum | Daily Strengthening Treatment for Weak or Damaged Hair | Nourishes and Reinforces Hair | Anti-Breakage | Silicone-Free | For Weakened Hair | Serum Fortifiant
- Kerastase Elixir Ultime Refillable Hair Oil - Hydrates & Smoothes Frizz, Adds Shine, With Wild Camellia, Nourishes & Strengthens Hair
- Kerastase Nutritive 8HR Magic Night Hair Serum - Overnight Beauty Sleep Nourishing Serum, Deeply Conditions, Reduces Tangles & Prevents Frizz, For All Hair Types

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**Shop now:** [https://www.desertcart.nz/products/257980866-fortifiant-leave-in](https://www.desertcart.nz/products/257980866-fortifiant-leave-in)

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*Product available on Desertcart New Zealand*
*Store origin: NZ*
*Last updated: 2026-01-23*