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Collagen Complex Hair Thickening Shampoo, 250ml

From £15.00

Introducing the UK’s first ever collagen complex formula shampoo expertly formulated to tackle fine, thin hair right from the root. Our unique collagen complex is formulated by leading hair specialists to strengthen, thicken, nourish, volumise, and deeply but gently cleanse the hair. It’s clinically proven to boost hair thickness by up to 20% in just 8 weeks with everyday use in conjunction with our thickening conditioner.*

A little goes a long way: use just a 10p coin sized amount of our thickening shampoo as part of your daily Absolute Collagen routine. Our shampoo works best when used daily with our thickening conditioner. Try our collagen shampoo & conditioner together!

*Source: Consumer testing conducted 2021

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FREE Next Working Day Delivery. Order Before 4pm (UK Only)
Image of Gemma, a happy Absoluter using the Absolute Collagen Thickening Shampoo
"Growing the hair longer and a couple of months after using the Absolute Collagen haircare, look at the thick(ness)! AC you are my hair care hero!" - Gemma

BETTER TOGETHER Try our shampoo & conditioner together for best results from £28.00 View product

Our powerhouse thickening shampoo uses a market-leading collagen complex formula to tackle thin, flat hair while deeply and gently cleansing.

Soluble collagen wraps the hair cuticle, gently and powerfully cleansing the hair to leave it feeling fresh, clean, and cared for. Alongside this, collagen amino acids work their way deep into the cortex of the hair, where they boost volume and thickness from within.

Our powerhouse shampoo formula also includes wheat protein - which helps to increase hair’s body and volume, and plant protein to support with strengthening the hair, working alongside our groundbreaking collagen technology.

For best results, follow with Absolute Collagen thickening conditioner, try them together and use alongside our award-winning daily liquid collagen supplement.

The Benefits


Absolute Collagen’s daily collagen drink, thickening shampoo, and thickening conditioner system are the powerhouse trio your hair will love. One sachet a day of Absolute Collagen counters natural loss of of collagen that occurs as we age, providing your hair with all the essential amino acids it needs in order to thrive.

Did you know, hair cells are the second thirstiest cell in the body, but one of the least essential? In practical terms, this means a decline of collagen and lack of protein will often affect hair first, leading to unwanted symptoms like thinning and brittleness.

Our groundbreaking collagen complex formula provides deep nourishment to the hair’s internal cortex, for greater strength and volume, as well as smoothing and hydrating the external cuticle, for hair as full of life as you are! Enjoy stronger, thicker, more volumised hair with a lightweight flourish, deeply cleansed and looking and feeling fresh.

About Absolute Collagen’s Thickening Shampoo

Our Absoluters shared their hair concerns - thin, fine hair that’s often weighed down by existing thickening products - and we created our collagen complex formula shampoo to tackle these hair issues. Our shampoo is 97% natural, paraben free and not tested on animals, and has been expertly formulated specifically to boost hair thickness and volume without weighing your hair down or clogging the hair with built-up, weighty product.


Absolute Collagen’s thickening shampoo was created in partnership with leading UK hair experts and scientists, including Eva Proudman MIT IAT, the Chairman of the Institute of Trichologists. Eva also carried out the clinical trials that prove that everyday use of our thickening shampoo can boost hair thickness by up to 20% in just 8 weeks when used alongside our thickening conditioner.

Ingredients & Other Need to Know Information

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.

Updating My Order: At Absolute Collagen, we make it easy for you to amend your order, whether you want to take a break from AC or bring forward your order. For further information regarding our cancellation policy, please read our terms and conditions.

Collagen Shampoo FAQs

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 a bottle of Absolute Collagen Thickening Shampoo in a bathroom

The power of our collagen shampoo

Collagen is found in many parts of the body including the hair, and as our natural collagen levels begin to decline from age 25, it will often affect hair first, leading to unwanted symptoms like thinning and brittleness.

A daily routine of using Absolute Collagen Shampoo can improve your hair by supporting your body’s natural collagen levels, including thicker-looking and glossier hair that’s just that much easier to style.

So, why choose our collagen shampoo?

  • Our collagen shampoo utilises the power of liquid collagen in a unique collagen complex formula that works to strengthen, nourish, cleanse and volumise hair on the inside and out.
  • Clinically proven to improve hair texture and thickness by up to 20% in just 8 weeks.
  • Developed with UK’s leading hair specialist, Eva Proudman, Chairman of the Institute of Trichologists and expertly formulated to complement your daily dose of Absolute Collagen
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