Skip to content

Free Delivery on orders over £20!

Collagen Complex Hair Thickening Shampoo & Conditioner Duo, 2x250ml

From £28.00
Our Absoluter tried-and-tested haircare range is a market-leading collagen shampoo and conditioner duo that work together as a system to banish thin, flat hair for good. Our unique collagen complex is formulated by leading hair specialists to strengthen, thicken, nourish, volumise, and boost the hair’s shine. Clinical trials showed up to 20% increase in hair thickness in just 8 weeks.
Read More
Select purchase option
Repeat order (automatic renewal) No obligations - cancel anytime 👍
Free UK delivery on all orders over £20!
Image of Rachel, a happy Absoluter using the Absolute Collagen Shampoo & Conditioner
"Absolute Collagen shampoo and conditioner didn’t disappoint. It makes my hair not only feel amazing but look so shiny and glossy." - Rachel
BETTER TOGETHER - Support your hair from within. Use alongside our daily collagen supplement for maximum results. View Product

Absolute Collagen thickening shampoo uses groundbreaking collagen technology to tackle thin, flat hair and fight signs of hair ageing using a unique collagen complex formula. It contains soluble collagen which wraps the hair cuticle in a protective layer to deeply nourish it, providing shine and gloss, while collagen amino acids penetrate the cortex of the hair to add volume and thickness. We’ve also included wheat protein, which boosts body and volume, and plant protein, which strengthens the hair.

Follow with Absolute Collagen thickening conditioner, a powerhouse formula where our cutting-edge collagen technology is the star. This formula delivers strength and structure to the hair deep within the cortex, while also nourishing and ensuring the hair stays hydrated and supple. Plus, it’s packed full of enriching oils which work together to strengthen, smooth, hydrate, and nourish your hair.

Just a small amount of shampoo and conditioner goes a long way, delivering powerful thickening results and volume with the ‘wow’ factor. The overall effect is smoother, sleeker, stronger hair without flatness or frizziness, for luscious locks as full of life as you are!

Absolute Collagen on TV!

We're on TV! Have you spotted our TV advert, featuring our amazing Absoluters?

Our co-founder Maxine Laceby founded Absolute Collagen in 2017 in her very own kitchen after experimenting with chicken broth, and realised just how amazing the results were for her skin, hair and nails using the collagen produced.

Fast forward 5 years later and Absolute Collagen has gained some incredible achievements including: a community with thousands of Absoluters, a portfolio of prestigious awards, features in leading publications and now… our very own TV campaign!

One of the biggest aims for our TV campaign was to include people who represent the values and identity of Absolute Collagen, and so what better way to do this than to cast some of our very own Absoluters. We cast 5 of our long-term subscribers and invited them to the shoot to be the shining stars of the advert.

The Benefits


Absolute Collagen’s daily collagen supplement and thickening shampoo and conditioner system are the perfect combination for gorgeous hair. A daily dose of Absolute Collagen counters the decline of collagen that naturally comes with age, and provides all the essential amino acids that your hair needs for a good growth cycle. As the hair is the second thirstiest cell in the body, but one of the least essential, a shortage of collagen often affects hair first, causing thinning and brittleness.

Shoulder-length hair, for example, could be 3-4 years old - in which time it’s faced all sorts of environmental stressors including heat and colour treatments - so we’ve developed our haircare range to nourish your hair. It gives strength, thickness and volume, while keeping it in the very best condition.

This powerhouse duo provides deep nourishment to the hair’s cortex - for increased strength and volume - as well as delivering powerful smoothing hydration to the hair’s cuticle, giving you the thick, glossy, volumised hair you deserve!

About Absolute Collagen's Haircare Range

Everything we do is for our amazing Absoluters, we listened to your haircare needs, and knew we could develop a powerful thickening range to complement our daily supplement. It’s at least 96% natural, free from parabens and cruelty free, and has been specifically formulated to boost hair thickness and volume without weighing your hair down or clogging the hair with heavy product.


We created our shampoo and conditioner with leading UK hair experts and scientists, including Eva Proudman MIT IAT, the Chairman of the Institute of Trichologists, who also led the clinical trials that prove this powerhouse duo boost hair thickness by up to 20% in just 8 weeks with everyday use - but the benefits go so much further than that. Our trial participants found that after 12 weeks, you didn’t have to be a hair expert to see very noticeable changes in their hair - just looking without special instruments the changes were noticeable to casual observers as well as the trial participants themselves!


Some of the other benefits our participants noticed from using Absolute Collagen’s thickening shampoo and conditioner include:

  • Less shedding. This means that the hair stays for longer, making hair thicker overall, and also reduces the fatigue in the follicles.
  • Improved scalp balance. The cleansing action of the shampoo helps to balance the scalp, meaning the hair grows for longer, ie keeps on going and getting longer
  • Less breakage. This is due to sleeker hair and improved cortex strength, both of which are important for reducing breakage.
  • Increase in the number of follicular units. This simply refers to the number of follicles with multiple hairs sprouting from them. With more hairs per follicle, your hair naturally looks noticeably thicker.
  • Plus, these multiple hairs were nourished enough to get thicker and stronger, which helped with visible hair thickness and density.

In short, daily use of Absolute Collagen’s thickening shampoo and conditioner delivers powerful results, tackling thin, fine hair from multiple angles to give you glossy, thick hair from root to tip.

Clinical Trial

Eva Proudman, MIT IAT, Chairman of the Institute of Trichologists, carried out a clinical trial into the effects and benefits of Absolute Collagen’s thickening shampoo and thickening conditioner.


As Member of the Institute of Trichologists, and current Chairman of the Institute, Eva is bound by a strict ethical code of Practice, to ensure that any advice or information that she gives is not misleading in any way, and does not promise miracle cures that are in any way unfounded, untested or simply not true.

The trial lasted 12 weeks and measured the hair density, diameter, and amount of single, double and triple follicular units. After 8 weeks, up to 20% increase in hair thickness was observed in trial participants who used both the shampoo and conditioner together 5 times a week.


SHAMPOO (250ml): Aqua (Water), TEA-Lauryl Sulfate, Myristamide DIPA, Glycerin, Disodium Laureth Sulfosuccinate, Lauryl Betaine, Glycol Distearate, Parfum (Fragrance), Laureth-4, Sodium Chloride, Pentylene Glycol, Cocamidopropyl Betaine, Hydroxypropyl Guar Hydroxypropyltrimonium Chloride, Polyquaternium-7, Collagen Amino Acids, Phenoxyethanol, Dehydroacetic Acid, Citric Acid, Triticum Vulgare (Wheat) Bran Extract, Potassium Sorbate, Soluble Collagen, Leuconostoc/Radish Root Ferment Filtrate, Formic Acid, 1,2-Hexanediol, Caprylyl Glycol, Methylisothiazolinone, Benzyl Alcohol, Hexyl Cinnamal, Limonene, Linalool, Geraniol.

CONDITIONER (250ml): Aqua (Water), Glycerin, Cetearyl Alcohol, Cocos Nucifera (Coconut) Oil, Behentrimonium Chloride, Olea Europaea (Olive) Fruit Oil, Cetrimonium Chloride, Parfum (Fragrance), Amodimethicone, Ricinus Communis (Castor) Seed Oil, Ethyltrimonium Chloride Methacrylate/Hydrolyzed Wheat Protein Copolymer, Prunus Amygdalus Dulcis (Sweet Almond) Oil, Pentylene Glycol, Collagen Amino Acids, Hydrogenated Vegetable Oil, Dehydroacetic Acid, Trideceth-12, Triticum Vulgare (Wheat) Bran Extract, Soluble Collagen, Citric Acid, Disodium EDTA, Phenoxyethanol, Potassium Sorbate, Leuconostoc/Radish Root Ferment Filtrate, Sodium Benzoate, 1,2-Hexanediol, Caprylyl Glycol, Tocopherol, Benzyl Alcohol, Hexyl Cinnamal, Limonene, Linalool.

Absolute success stories

Tiffany's success

"I don't have bad hair days anymore. Previously it would bring me down."

Nancy's success

"I got my happiness back. I was actually not ashamed of my hair anymore. Emotionally it's made a huge difference."

Joanna's success

"When I'm at home pottering about I put my hair into a clip, and now my hair doesn't fit into the clip."

    thicker hair in just 8 weeks - clinically proven
    natural ingredients
    star ratings out of 5

Frequently asked questions

Why did we create it?

There are several thickening hair products out there, but they use heavy formulations that build up and weigh hair down, leaving it limp and flat. Absolute Collagen’s thickening shampoo and conditioner is the UK’s first collagen complex formulation shampoo and conditioner. It works to nourish, thicken, and volumise thinning hair, while maintaining that all-important lightness.

How does it work?

Just a small amount of shampoo and conditioner delivers powerful results. Hair is visibly thicker and more volumised.

Our groundbreaking new formula nourishes and strengthens hair inside while wrapping the hair cuticle to protect it externally, keeping it nourished and volumised.

It tackles thin, fine hair with the power of our unique collagen complex formula, increasing strength, volume, gloss and shine. It also reduces breakage and hair shedding.

Who should use it?

Anyone with thin, fine hair who would like to increase their hair thickness and volume. It’s suitable for all hair types and can be used on bleached and dyed hair alike. Consumer testing shows that coloured hair doesn’t fade even after 12 weeks of use, so Absoluters can be confident their colour won’t be affected by our products.

As it contains collagen, the shampoo and conditioner are not suitable for vegetarians or vegans.

How much should I use and how often should I use it?

You only need to use a small amount of the shampoo and conditioner as they are powerful and effective - we recommend using an amount that’s roughly the size of a 10p coin.

We recommend you wash your hair a minimum of 5 times a week for the optimum results, however we understand this isn’t suitable for all lifestyles. Every other day will also work well, but it may take longer to see results.

Click here to read more haircare FAQs.

Image of Maxine with two Absoluters who trialled the Absolute Collagen Thickening Shampoo & Conditioner

The UK’s first collagen complex haircare system

So, why use a collagen complex shampoo? As the original collagen specialists, we know collagen depletion takes its toll on our hair. By the age of 50, we’ve lost around half of our natural collagen, causing dry, flat, and thin hair.

  • There are several thickening hair products out there, but they use heavy formulations that build up and weigh hair down, leaving it limp, lifeless and flat.
  • Absolute Collagen’s hair care gives you thicker hair, from within. It also reduces breakage and hair shedding.
  • It doesn’t harm your colour. Our super-gentle cleaners wash and care for your scalp and hair, without stripping or fading your dyed hair.
  • For best results, we recommend using our hair care alongside a daily dose of Absolute Collagen’s award winning collagen supplement.
We've been featured in...