---
product_id: 381131103
title: "The INKEY List 1% Caffeine Stimulating Scalp Hair Loss Reduction Serum Overnight Treatment 150ml"
brand: "the inkey list"
price: "€ 41.72"
currency: EUR
in_stock: true
reviews_count: 13
category: "The Inkey List"
url: https://www.desertcart.fi/products/381131103-the-inkey-list-1-caffeine-stimulating-scalp-hair-loss-reduction
store_origin: FI
region: Finland
---

# 1% Caffeine Stimulates follicles 1% Redensyl Boosts hair growth 1% Betaine Conditions & softens The INKEY List 1% Caffeine Stimulating Scalp Hair Loss Reduction Serum Overnight Treatment 150ml

**Brand:** the inkey list
**Price:** € 41.72
**Availability:** ✅ In Stock

## Summary

> ☕🌿 Wake up to a scalp that’s buzzing with growth!

## Quick Answers

- **What is this?** The INKEY List 1% Caffeine Stimulating Scalp Hair Loss Reduction Serum Overnight Treatment 150ml by the inkey list
- **How much does it cost?** € 41.72 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.fi](https://www.desertcart.fi/products/381131103-the-inkey-list-1-caffeine-stimulating-scalp-hair-loss-reduction)

## Best For

- the inkey list enthusiasts

## Why This Product

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

## Key Features

- • **Universal Hair Love:** Formulated for all hair types, including color-treated, cruelty-free & fragrance-free.
- • **Wake Up to Fuller Hair:** Overnight caffeine infusion energizes scalp for visible hair thickness.
- • **Long-Term Transformation:** Consistent use over 3 months delivers proven reduction in hair shedding.
- • **Effortless Nightly Ritual:** Simple scalp massage before bed fits seamlessly into your self-care routine.
- • **Clinically Backed Redensyl Power:** Patented ingredient targets hair loss at the root for lasting growth.

## Overview

The INKEY List 1% Caffeine Stimulating Scalp Serum is a 150ml overnight treatment combining 1% caffeine powder and patented Redensyl to reduce hair loss and stimulate follicle activity. Suitable for all hair types and free from fragrance and cruelty, it conditions hair with 1% Betaine while promoting thicker, healthier hair with consistent nightly use over 3 months.

## Description

Product Description An overnight scalp treatment that uses caffeine powder and an ingredient called Redensyl to help reduce hair loss by stimulating the scalp and hair follicles, therefore encouraging hair growth and helping to improve hair thickness. Consistent use every night over a 3 month period produces best results. Ingredients Water (Aqua /Eau), Betaine, Caffeine, Panthenol, Phenoxyethanol, Glycerin, Xanthan Gum, Ethylhexylglycerin, Trisodium Ethylenediamine Disuccinate, Lactic Acid, Sodium Metabisulfite, Glycine, Larix Europaea Wood Extract, Camellia Sinensis (Tea) Extract, Zinc Chloride. P.when('A').execute(function(A) { A.on('a:expander:toggle_description:toggle:collapse', function(data) { window.scroll(0, data.expander.$expander[0].offsetTop-100); }); }); Directions Use nozzle to apply directly onto scalp and use fingertips to rub in. Consistent nightly use produces best results. Safety Warning No known safety warnings, fragrance-free, alcohol-free, silicon-free, sulphate-free See more

Review: A solution for seasonal shedding and perimenopause thinning? - I have been using this product for a week and so far the results look promising. My particular issue is seasonal shedding, whereby I lose a lot of hair in the warmer months, particularly July and August, which then eases back in the colder months. That, combined with general perimenopause-related thinning, means I simply cannot grow my hair past shoulder-length without it looking ratty at the ends. Which is a downer because it suits me better when it's a bit longer. I have been applying the treatment every night before going to bed. It is cool to the touch, easy to apply on your finger tips and doesn't really smell of anything to me. On the first application I noticed the skin on my face felt really dry the next morning, but I figured it was because the treatment was migrating on to my face from the pillow as I slept. Putting my hair in a fine wool snood overnight after treatment seems to have solved that one. My hair is not greasy in the morning, and the treatment seems to have soaked in and disappeared, which is great as, being very fine and curly, I only wash and brush my hair every three days. Just spritz, scrunch and go. Then, when I washed my hair for the second time after starting the treatment (at the end of week 1), I discovered that only the tiniest amount actually came out in the brush (see picture, measured against a one penny piece - about the same size as a 1 cent). Admittedly this is the winter, so I would expect to be shedding much less now anyway, but still it seemed to be a particularly small amount, after three days since my last wash and brush. Could it be working already? Admittedly the real test will come when the days lengthen and the temperature rises, so this is a review 'part 1', which I will come back to when I have continued the treatment through the summer. Handily, desertcart offer this on a subscription, so I won't run out. I'll be back with an update in 8 months or so....
Review: Fab - The bottle seems to last quite a while which is nice and it’s obviously wet on your hair but doesn’t dry greasy and I do think it’s helping my hair to grow a little. I do love inkey list products anyway

## Features

- HAIR GROWTH SERUM - An overnight scalp treatment that uses caffeine powder and a new ingredient called Redensyl to help reduce and prevent hair loss by stimulating hair follicles, therefore encouraging hair growth and helping to improve hair thickness
- POWERFUL INGREDIENTS - 1 percent Caffeine powder helps to stimulate the scalp and hair follicles whilst 1 percent REDENSYL helps to improve hair growth while reducing hair loss; 1 percent Betaine helps to condition hair, leaving it soft and healthy; Redensyl is a trademark of Givaudan and is used with permission
- FOR ALL HAIR TYPES - Formulated so it's suitable for all hair types including coloured hair, it is cruelty-free and fragrance-free
- HOW TO USE - We recommend shaking the bottle before use; Use as an overnight treatment; Shake into the palm of your hand, massage hands together, use your fingertips to rub into the scalp and leave on overnight; Apply enough to cover the entire scalp; Wash hair as normal in the morning, if desired; Use every night for best results over a 3-month period

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B09K8D3JHK |
| ASIN  | B09K8D3JHK |
| Best Sellers Rank | 4,607 in Beauty ( See Top 100 in Beauty ) 20 in Hair Serums |
| Brand | The INKEY List |
| Customer Reviews | 4.4 4.4 out of 5 stars (292) |
| Customer reviews | 4.4 4.4 out of 5 stars (292) |
| Date First Available | 25 Oct. 2021 |
| Format | Serum |
| Item dimensions L x W x H | 15 x 5 x 15 centimetres |
| Item model number | IH006KM |
| Item model number  | IH006KM |
| Item weight | 153 Grams |
| Manufacturer | Be for Beauty |
| Manufacturer  | Be for Beauty |
| Package Weight | 0.18 Kilograms |
| Package dimensions | 15.1 x 5.5 x 5.3 centimetres |
| Product Dimensions | 15 x 5 x 15 cm; 153 g |
| Product Dimensions  | 15 x 5 x 15 cm; 153 g |
| Scent | Unscented |
| Special features | Unscented |
| Volume | 150 Millilitres |

## Product Details

- **Active ingredients:** caffeine
- **Brand:** The INKEY List
- **Item form:** Serum
- **Item weight:** 153 Grams
- **Scent:** Unscented

## Images

![The INKEY List 1% Caffeine Stimulating Scalp Hair Loss Reduction Serum Overnight Treatment 150ml - Image 1](https://m.media-amazon.com/images/I/51qHljWD6KL.jpg)

## Available Options

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

## Customer Reviews

### ⭐⭐⭐⭐⭐ A solution for seasonal shedding and perimenopause thinning?
*by N***K on 15 January 2026*

I have been using this product for a week and so far the results look promising. My particular issue is seasonal shedding, whereby I lose a lot of hair in the warmer months, particularly July and August, which then eases back in the colder months. That, combined with general perimenopause-related thinning, means I simply cannot grow my hair past shoulder-length without it looking ratty at the ends. Which is a downer because it suits me better when it's a bit longer. I have been applying the treatment every night before going to bed. It is cool to the touch, easy to apply on your finger tips and doesn't really smell of anything to me. On the first application I noticed the skin on my face felt really dry the next morning, but I figured it was because the treatment was migrating on to my face from the pillow as I slept. Putting my hair in a fine wool snood overnight after treatment seems to have solved that one. My hair is not greasy in the morning, and the treatment seems to have soaked in and disappeared, which is great as, being very fine and curly, I only wash and brush my hair every three days. Just spritz, scrunch and go. Then, when I washed my hair for the second time after starting the treatment (at the end of week 1), I discovered that only the tiniest amount actually came out in the brush (see picture, measured against a one penny piece - about the same size as a 1 cent). Admittedly this is the winter, so I would expect to be shedding much less now anyway, but still it seemed to be a particularly small amount, after three days since my last wash and brush. Could it be working already? Admittedly the real test will come when the days lengthen and the temperature rises, so this is a review 'part 1', which I will come back to when I have continued the treatment through the summer. Handily, Amazon offer this on a subscription, so I won't run out. I'll be back with an update in 8 months or so....

### ⭐⭐⭐⭐⭐ Fab
*by S***Y on 13 June 2025*

The bottle seems to last quite a while which is nice and it’s obviously wet on your hair but doesn’t dry greasy and I do think it’s helping my hair to grow a little. I do love inkey list products anyway

### ⭐⭐⭐⭐ Seems to work great
*by J***L on 19 July 2025*

I can't say with certainty if this is directly responsible for the noticeable improvement with my hair the last few weeks (as I have applied two additional products) but I'm pretty sure it is...and therefore I quite confidently praise this product as very effective for me personally.

## Frequently Bought Together

- The INKEY List Caffeine Stimulating Scalp Treatment, Contains Redensyl and Caffeine to Encourage Natural Hair Growth Cycle, Leaves Hair Feeling Soft, 5.07 fl oz
- Nizoral Anti-Dandruff Shampoo with 1% Ketoconazole, Fresh Scent, 7 Fl Oz
- The Ordinary Multi-Peptide Serum for Hair Density, Peptide-Powered Formula for Thicker, Fuller Looking Hair

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*Product available on Desertcart Finland*
*Store origin: FI*
*Last updated: 2026-02-23*