---
product_id: 201127239
title: "Extreme Length Biotin Leave-In Conditioner For Longer Hair – Promotes Healthy Hair Growth, Strengthens Damaged Hair, Seals Split Ends, Infused With Biotin ​"
brand: "redken"
price: "€ 70.20"
currency: EUR
in_stock: true
reviews_count: 13
category: "Redken"
url: https://www.desertcart.hr/products/201127239-extreme-length-biotin-leave-in-conditioner-for-longer-hair-promotes
store_origin: HR
region: Croatia
---

# Seals split ends & smooths cuticle Biotin & Soy Protein boost growth Strength Complex fortifies hair Extreme Length Biotin Leave-In Conditioner For Longer Hair – Promotes Healthy Hair Growth, Strengthens Damaged Hair, Seals Split Ends, Infused With Biotin ​

**Brand:** redken
**Price:** € 70.20
**Availability:** ✅ In Stock

## Summary

> 🌿 Unlock your hair’s full potential with every drop!

## Quick Answers

- **What is this?** Extreme Length Biotin Leave-In Conditioner For Longer Hair – Promotes Healthy Hair Growth, Strengthens Damaged Hair, Seals Split Ends, Infused With Biotin ​ by redken
- **How much does it cost?** € 70.20 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.hr](https://www.desertcart.hr/products/201127239-extreme-length-biotin-leave-in-conditioner-for-longer-hair-promotes)

## Best For

- redken enthusiasts

## Why This Product

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

## Key Features

- • **Split End Savior:** Seals and prevents split ends, reducing breakage and damage.
- • **Fortify & Flourish:** Strength Complex repairs and strengthens every strand for resilient hair.
- • **Smooth & Manageable:** Reduces friction from brushing for silky, shiny, and tangle-free hair.
- • **Certified Clean Care:** Cradle to Cradle Certified for eco-conscious, guilt-free beauty.
- • **Growth-Boosting Formula:** Infused with Biotin and Soy Protein to accelerate longer, healthier hair.

## Overview

Redken Extreme Length Leave-In Treatment is a biotin and soy protein-enriched formula designed to strengthen damaged hair, seal split ends, and prevent breakage. Featuring Redken’s Strength and Length Care Complex, it smooths the cuticle, reduces friction, and supports longer, healthier hair growth—all while being Cradle to Cradle Certified for sustainable beauty.

## Description

Buy Redken Extreme Length Leave-In Treatment For Hair Growth - Seals Split Ends & Prevents Breakage, Infused With Biotin on desertcart.com ✓ FREE SHIPPING on qualified orders

Review: LOVE IT! - I've been trying to go the natural hair routine for 2 years since it seemed my hair has been struggling with length. I finally saw this product nd thought "why not" since seeking to find what is best for me has been a journey for all aspects of myself. Just to let you know I only use this product once a week. I will explain: My shower routine is that I exfoliate my scalp with a salt scrub, wash with shampoo and them use the REDKEN mask and message it into my scalp for the instructed time and then rinse off with cold water. Then I used the REDKEN leave on conditioner and let my hair air dry....and I would say these two products had made my hair feel more healthy then the all natural hair routine I've been using. Yes, maybe all natural works for some, but these two additions to my hair routine had relieved my hair of past issues ive been struggling with. It was always dry, and flaky the next day or when hours after a wash and I was trying to do less hair washes, but it was difficult due to how embarrassingly flaky and oily my hair got after one day. Adding the REDKEN Extreme Length Mask and leave in conditioner to my routine had allowed my hair to last a week till it showed signs of oiliness and flaking which lead me to believe I didn't have dandruff but my scalp was just overly dry from these so called natural hair products. REDKEN had helped in maintaining the moisture in my hair which helped my scalp from over producing oils that ended up making it look so greasy looking and flaky. I only use it once a week and in that week my hair feels silky, soft and healthy I feel like a model flipping my hair around its ridiculous! I have only used this product twice, as I said I've been only using it once a week. so I can't really say if it had helped my hair with growing more length. but i had done my share of research that states that when issues with hair not growing past a certain length it could be due to hair damage (or split end) causing the hair to break not along it to lengthen. If these products can maintain the moisture in my hair for a week, then I would confidently say that if I continue to use these products my hair strans will grow more stronger and hydrated that my ends will not be so easily broken. This is my theory after all on how this product line is intended to work. I will update this review if that is the case!
Review: Requirement In My General Hair Care Routine - Let me start with: I’m a big fan of Redken products. 35/F, my hair is 2.5ft long, and I’ve had long hair the majority of my life. This Extreme Length Leave-in is a godsend. I tried it a little over a year ago and it’s now part of my general hair care routine. After towel drying and combing my hair, I add this to the lengths of my hair, roughly my ears down to the ends, but definitely caring for the ends the most. It’s lightweight enough to not be heavy while adding adequate moisture, and tames any shredded dead ends. No added shine (though Redken does make a good shine spray, but that’s for another review ;) ) Redken can be a bit expensive but they provide a very good product. I have this particular one on subscription because it’s a better value to just have it show up on schedule (with the ability to adjust arrival) than having to order or go to Ulta. The price for Sub&Save is helpful too.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN  | B086L3RLVM |
| Best Sellers Rank | #7,923 in Beauty & Personal Care ( See Top 100 in Beauty & Personal Care ) #185 in Hair Conditioner |
| Customer Reviews | 4.6 4.6 out of 5 stars (5,245) |
| Is Discontinued By Manufacturer  | No |
| Item model number  | P18507 |
| Manufacturer  | Redken |
| Product Dimensions  | 2.37 x 1.53 x 7.66 inches; 5.6 ounces |
| UPC  | 884486456205 000030160293 |

## Product Details

- **Brand:** Redken
- **Hair Type:** Damaged
- **Item Form:** Liquid
- **Material Feature:** Vegan
- **Product Benefits:** Biotin and soy protein infused leave in conditioner that helps hair growth for damaged hair

## Images

![Extreme Length Biotin Leave-In Conditioner For Longer Hair – Promotes Healthy Hair Growth, Strengthens Damaged Hair, Seals Split Ends, Infused With Biotin ​ - Image 1](https://m.media-amazon.com/images/I/61f3Av6UCKL.jpg)

## Available Options

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

## Questions & Answers

**Q: What is the main ingredient in Extreme Length?**
A: All Extreme Length products are infused with biotin as part of its Length Care Complex for longer, stronger hair.

**Q: How does Extreme Length help hair grow longer?**
A: Using the full system reduces breakage by up to 81%*, helping you achieve maximum hair length.

**Q: What is the difference between the Extreme ranges?**
A: Extreme is the professional solution for damaged hair. Extreme Length helps to fortify lengths for 81% less breakage to help grow hair longer, when used as a system. Extreme Bleach Recovery helps restore a healthy touch between lightening services.

## Customer Reviews

### ⭐⭐⭐⭐⭐ LOVE IT!
*by E***Y on April 13, 2023*

I've been trying to go the natural hair routine for 2 years since it seemed my hair has been struggling with length. I finally saw this product nd thought "why not" since seeking to find what is best for me has been a journey for all aspects of myself. Just to let you know I only use this product once a week. I will explain: My shower routine is that I exfoliate my scalp with a salt scrub, wash with shampoo and them use the REDKEN mask and message it into my scalp for the instructed time and then rinse off with cold water. Then I used the REDKEN leave on conditioner and let my hair air dry....and I would say these two products had made my hair feel more healthy then the all natural hair routine I've been using. Yes, maybe all natural works for some, but these two additions to my hair routine had relieved my hair of past issues ive been struggling with. It was always dry, and flaky the next day or when hours after a wash and I was trying to do less hair washes, but it was difficult due to how embarrassingly flaky and oily my hair got after one day. Adding the REDKEN Extreme Length Mask and leave in conditioner to my routine had allowed my hair to last a week till it showed signs of oiliness and flaking which lead me to believe I didn't have dandruff but my scalp was just overly dry from these so called natural hair products. REDKEN had helped in maintaining the moisture in my hair which helped my scalp from over producing oils that ended up making it look so greasy looking and flaky. I only use it once a week and in that week my hair feels silky, soft and healthy I feel like a model flipping my hair around its ridiculous! I have only used this product twice, as I said I've been only using it once a week. so I can't really say if it had helped my hair with growing more length. but i had done my share of research that states that when issues with hair not growing past a certain length it could be due to hair damage (or split end) causing the hair to break not along it to lengthen. If these products can maintain the moisture in my hair for a week, then I would confidently say that if I continue to use these products my hair strans will grow more stronger and hydrated that my ends will not be so easily broken. This is my theory after all on how this product line is intended to work. I will update this review if that is the case!

### ⭐⭐⭐⭐⭐ Requirement In My General Hair Care Routine
*by H***I on November 19, 2025*

Let me start with: I’m a big fan of Redken products. 35/F, my hair is 2.5ft long, and I’ve had long hair the majority of my life. This Extreme Length Leave-in is a godsend. I tried it a little over a year ago and it’s now part of my general hair care routine. After towel drying and combing my hair, I add this to the lengths of my hair, roughly my ears down to the ends, but definitely caring for the ends the most. It’s lightweight enough to not be heavy while adding adequate moisture, and tames any shredded dead ends. No added shine (though Redken does make a good shine spray, but that’s for another review ;) ) Redken can be a bit expensive but they provide a very good product. I have this particular one on subscription because it’s a better value to just have it show up on schedule (with the ability to adjust arrival) than having to order or go to Ulta. The price for Sub&Save is helpful too.

### ⭐⭐⭐⭐⭐ One of my go-to’s when I feel like my hair needs a reset.
*by B***A on January 8, 2026*

Holy grail! I love this product, excellent for breakage-prone/brittle ends. As a blonde I use it almost every day.

## Frequently Bought Together

- Redken Extreme Length Leave-In Treatment For Hair Growth - Seals Split Ends & Prevents Breakage, Infused With Biotin
- Redken Extreme Length Conditioner For Damaged Hair - Fortifies, Strengthens and Conditions Hair, Infused With Biotin & Castor Oil For Hair Growth
- Redken Extreme Length Shampoo For Damaged Hair - Prevents Breakage and Strengthens Hair, Infused With Biotin For Hair Growth

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**Shop now:** [https://www.desertcart.hr/products/201127239-extreme-length-biotin-leave-in-conditioner-for-longer-hair-promotes](https://www.desertcart.hr/products/201127239-extreme-length-biotin-leave-in-conditioner-for-longer-hair-promotes)

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*Product available on Desertcart Croatia*
*Store origin: HR*
*Last updated: 2026-02-21*