TripleBright oxidation defense purple shampoo

£39

TripleBright oxidation defense purple shampoo

4.9

Rated 4.9 out of 5 stars

351 Reviews

new

TripleBright oxidation defense purple shampoo

Name: TripleBright oxidation defense purple shampoo
Brand: K18Hair
Price: 39.00 GBP
Availability: OutOfStock

Breakthrough triple-action protection for brighter, longer-lasting blonde

£39

View Full Details

description

The first triple-action purple shampoo to remove metals + minerals, neutralize existing brass, and defend against future brassiness for blonde like new, hair like new*.

- how to use
  
  Apply foam shampoo to wet hair, distributing evenly, lathering from roots to ends. Let sit for 1-3 minutes then rinse.
- more to know
  
  Powered by K18 triple-action technology:
  
  1. Removes brass-inducing metals and minerals with ionic detox
  2. Neutralizes brassiness with precision violet technology that won’t stain or overtone
  3. Defends against future brass with biopolymer to help prevent reattachment of metals + minerals during washing
- key benefits
  
  - 1 wash removes up to 3 months of brass from hard water*
  - Neutralizes brassiness without staining or overtoning
  - Ideal hair tone is restored and evened* for all highlighted and lifted tones
  - Easy-to-apply foam
  
  *k18hair.com/disclaimers
- ingredients
  
  Water(Aqua)(Eau), Cocamidopropyl Hydroxysultaine, Sodium Cocoyl Alaninate, Sodium Methyl Cocoyl Taurate, Propanediol, Polysorbate 20, Cocamidopropyl Betaine, Trisodium Dicarboxymethyl Alaninate, Sodium Phytate, Polyquaternium-77, Glycerin, Sodium Polyaspartate, Sodium Citrate, Sodium Gluconate, Citric Acid, Tetrasodium Glutamate Diacetate, Aspartic Acid, Caprylyl Glycol, Cocamidopropyl Dimethylamine, Sodium Glycolate, Sodium Hydroxide, Sodium Benzoate, Sodium Chloride, Acid Violet 43 (CI 60730), Phenoxyethanol, Fragrance (Parfum), Hexyl Cinnamal, Hydroxycitronellal, Citrus Limon (Lemon) Peel Oil, Tetramethyl Acetyloctahydronaphthalenes, Limonene, Benzyl Salicylate, Citrus Aurantium Peel Oil, Citrus Aurantium Flower Oil.

pairs well with

DAMAGE SHIELD protective conditioner

HeatBounce conditioning heat protectant

got questions?

Get started here.

How is TripleBright different from traditional purple shampoos?

TripleBright is not a color-depositing purple shampoo. Traditional purple shampoos temporarily tone hair with basic color correction that can turn hair purple, but don’t target the underlying cause of brassiness: oxidation, such as metals + minerals in hard water.

TripleBright is a breakthrough triple-action formula that not only neutralizes existing brassiness without turning hair purple, but 1 wash removes up to 3 months of brass from hard water*, while also defending against future brass. The non-staining, easy-to-apply foam rinses with water and allows for targeted application.

*k18hair.com/disclaimers

Does TripleBright work on all hair types?

Yes, TripleBright works on all hair types and textures. It brightens all highlighted and lifted tones by defending against oxidative stress and reducing brass—delivering brighter, longer-lasting blonde for everyone.

will TripleBright turn my hair purple?

No. When used as directed, TripleBright purple shampoo’s precision violet technology expertly neutralizes brassiness without overtoning or staining.

Will TripleBright stain my hands or clothes?

No, TripleBright will not stain your hands or clothes. When used as directed, the non-staining and easy-to-apply foam format rinses with water.

How much TripleBright should I apply?

We recommend using 2-3 pumps of TripleBright purple shampoo per application. Apply to wet hair, distributing evenly and lathering from roots to ends.

powered by K18 triple-action technology

Remove, neutralize + defend against brass for brighter, longer-lasting blonde.

Explore the Science

how to use TripleBright

1. Apply 2-3 pumps of foam shampoo to wet hair.

2. Distribute evenly, lathering from roots to ends.

3. Let sit for 1–3 minutes maximum, then rinse. Use up to once weekly.

4. Rinse.

learn more on our blog

May 14, 2026 / featured, products

How to Keep Your Blonde Soft, Strong + Bouncy

The biotech-powered duo for blonde like new, hair like new.*

April 30, 2026 / products

Top TripleBright FAQs

Answers to your most asked purple shampoo questions for brighter, longer-las...

April 23, 2026 / products

what happens to blonde hair during the summer?

Plus, how to prevent brass and maintain that fresh-from-salon look with K18 t...

April 22, 2026 / products

how can you make your bright salon blonde last?

Exactly what to ask your stylist for (and how to maintain your results at hom...

March 27, 2026 / products

Meet TripleBright Oxidation Defense Purple Shampoo

A breakthrough for brighter, longer-lasting blonde.

feel what's possible with K18

See how K18 unlocks our community's expression

4.9

Rated 4.9 out of 5 stars

Based on 351 reviews

98%would recommend this product

Reviews Summary

Customers say this purple shampoo foam brightens blonde hair and effectively reduces brassiness without leaving a purple tint. The foam texture distributes easily through hair with just 1-2 pumps, making application simple and lightweight. Users appreciate that their hair feels soft and smooth after use, rather than dry or stripped like with traditional purple shampoos. Many note visible results after just one use, with hair looking brighter and more salon-fresh. The product maintains cool tones between salon visits and helps remove buildup. Some customers mention needing extra conditioning after use, and a few find the foam consistency takes getting used to.

Customers Talked About

Write a Review (Opens in a new window)

351 reviews

Sort

Esther C.
Verified Buyer
I recommend this product
Age 55 - 64
Hair Concern Fragile/brittle hair, Color-care, Dryness, Extending time between washes, Split-Ends
Hair Type Fine/Thin, Straight/Wavy, Grey Hair
My Results Visible Difference, Less Breakage, Smoother Hair, Shinier Hair, Soft Touchable Hair
Rated 5 out of 5 stars
4 days ago
Better than any other product on the market.
I’ve tried so many different purple shampoos and nothing compares to K 18. It leaves my hair feeling so soft and bright. I’ve also noticed a big decrease in the amount of hair in the shower. My hair just feels better anfter using K18. Even my husband uses it on his beard and he’s impressed with how soft his beard feels afterwards.
The first pic is before using K18. Second pic is after using K18.
Was this helpful?
KU
K18Hair UK
4 days ago
Thank you so much for your amazing review, Esther! 💛 We're thrilled TripleBright is working so well for you both! Your support means the world to us. ✨
Renee Y.
Verified Buyer
I recommend this product
Age 45 - 54
Hair Concern Color-care, Dryness, Heat damage
Hair Type Fine/Thin
My Results Visible Difference, Less Breakage
Rated 5 out of 5 stars
4 weeks ago
Love it!
Love this shampoo... NO purple residue... washes in and out easily, takes out brass, and I don't look purple like all the other shampoos!! ❤️
Was this helpful?
KU
K18Hair UK
4 weeks ago
Thank you so much, Renee! 💛 We're thrilled to hear TripleBright is giving you perfect brass-busting results without any purple residue. That's exactly what we designed it for! ✨
Michelle M.
Verified Buyer
I recommend this product
Rated 5 out of 5 stars
1 month ago
Blinde bombshell
So pleased with this product
Was this helpful?
KU
K18Hair UK
1 month ago
Thank you for your amazing review, Michelle! 💛 We're absolutely thrilled to hear you're so pleased with the TripleBright Oxidation Defense Purple Shampoo - "blonde bombshell" says it all! There's nothing better than finding that perfect purple shampoo that keeps your blonde looking absolutely stunning. We're so happy it's delivering those incredible results for you. Thank you for choosing K18 and for sharing your experience with us! ✨
Kelly H.
Verified Buyer
I recommend this product
Age 55 - 64
Hair Concern Chemical damage, Dryness, Frizz, Fragile/brittle hair
Hair Type Curly/Coily, Grey Hair
My Results Less Frizz, Less Breakage, Defined Curl/Wave Pattern, Visible Difference
Rated 5 out of 5 stars
1 month ago
White bright
Love the shampoo… not only does it make your white Sprite. It leaves your hair, feeling great, unlike all other purple shampoos.
Was this helpful?
KU
K18Hair UK
1 month ago
Thank you for the wonderful review! We're so happy to hear TripleBright is keeping your hair white and bright while feeling great. Thanks for sharing your experience!
Tracy G.
Verified Buyer
I recommend this product
Rated 5 out of 5 stars
1 month ago
Triple bright Shampoo
Absolutely amazing after 1 wash hair looks like it has just been done at hairdresser
Was this helpful?
KU
K18Hair UK
1 month ago
Thank you for your amazing review, Tracy! We're absolutely thrilled to hear that the TripleBright oxidation defense purple shampoo gave you such incredible salon-quality results after just one wash! That fresh-from-the-hairdresser feeling is exactly what we love to deliver. We're so happy TripleBright is working its magic on your hair. Thank you for choosing K18 and for sharing your experience with us! ✨

*Disclaimers