★☆☆☆☆June 22, 2026
Hard pass
Hard pass- having used other K18 products, I expected more from this brand. This shampoo is touted to removed hair water effects from your hair and neutralize brassy tones. While the foam texture is nice, that is where it stops. The shampoo smells- like old lady floral perfume and chemicals. My hair literally felt like straw- completely stripped of moisture. It is essentially a hard core chelating shampoo- honestly, I think Dawn dish soap would do the same thing. If you tone or color your hair, expect that some color will be removed. It did nothing to defeat or tone my brassiness- at all. I left it on for 5 minutes. Then I had to do a deep conditioning mask so I could even comb my straight, fine hair. It is non-staining, so I guess this is good. There are so many other purple hair products out there that smell better, are less expensive, and do a better job. I would skip this one.
M PreVerified purchaseHelpful (12)
★★★★★June 14, 2026
Best purple shampoo
I noticed an immediate change to my blonde, no brassines on the first use! This shampoo is a game changer and I really stopped going to the salon as much. The best purple shampoo I have tried! Note that you do need conditioner after using (I have fine, straight hair)
Cara MelVerified purchaseHelpful (9)
★★★★☆May 30, 2026
Please read this review if you have thick hair before you consider buying this product!
I have blonde thick medium length hair and bought this product when there was hardly any reviews. I thought it would be a great addition to my k18 molecular hair repair leave in system right now. I have been using this k18 triple bright purple shampoo then I rinse it with no conditioner and use the k18 molecular leave in after my shower. I had to use a lot of it to try to get it to a good lather all through my thick medium length hair. I also ended up over toning my blonde hair to a grey because I left it on for too long. So I had to use my k18 pre peptide detox to counteract that unfortunately and will not leave it on for too long in the future using it. However the foamy mousse consistency is a nice purple color and would be great for those with thinner hair than mine but otherwise it would be a waste of money. Also be very cautious to not leave it in the hair for too long and follow the instructions on the back if your hair is very porous from damaged bleached blonde hair like mine. But I do recommend it as is very effective at toning and good for the situation I have with my k18 molecular hair mask. Overall though if you stop the 2 step k18 leave in process I would choose a cheaper option of other great purple shampoos out there if you end up having to use too much of it for thick hair like mine. It has a nice fragrance though and left my hair condition a lot less drier than other purple shampoos. I just wish there was more product for thick hair like mine so just be cautious and buy for your own situation!
Audrey H.Verified purchaseHelpful (8)
★★★★★June 7, 2026
I'm no expert but....
Let me start by saying I know nothing about hair products. I give this five stars purely out of seeing actual results in one use. I have gray blending with highlights. I have been struggling with brassiness since December and to date nothing worked. I randomly came across this and decided to give it a go. I used it in combination with a purple shampoo and conditioner that has done nothing previosly but it isn't too drying,this product and a purple mask. In one use I saw a difference. The yellow was actually gone and the red undertones had softened to a bit more ash. I will definitely keep this in my rotation.
Bbrl00Verified purchaseHelpful (7)
★★★★★June 29, 2026
Best product I’ve ever tried, and I’ve tried a lot
This is by far the best product I’ve ever gotten. I have grey died hair and for the longest time no product I got worked, my hair would get brassy and I would have to pay to get it re toned. This product works wonders, it’s removed all of the yellow tones from my hair. The only problem I forsee for anyone else is that when you rinse it makes your hair wirey, and not feel good. But when paired with the k18 leave in mask, it cures all problems. 10/10 now the only products that keep my hair vibrant and soft
Fady SalameyVerified purchaseHelpful (7)
★★★★★July 2, 2026
So why aren't you using K18 TripleBright???
What a great shampoo for grays and blondes. I don't end up purple like my grandmother and it removes all the damage from hard water. You only use it once a week, so a little goes a long way. This company gets down to the molecular level, so you are also repairing each strand of hair...it smells great and your hair is so soft. Great value and fabulous product.
Amazon CustomerVerified purchaseHelpful (6)
★★★★★June 18, 2026
The WOW factor for my natural white and my natural dark hair.
I wasn’t too sure about ordering this after reading reviews, but I truly love it! I have naturally very dark brown hair and the sides (by my ears and temple) have grown in totally white, and now the top is growing in white as well. I noticed the hair on top was turning brassy before it turned white, and the hair on the sides near my temples looked a little yellowish at the end, so I wanted to see if I could eliminate some of the yellow and brass and even it out a bit. I was floored at the results. I’ve used violet shampoos before but this was amazing. My white got even brighter and lighter, all the brass and yellow, gone! Not only that but the color of the dark brown in my hair looks so much more even and beautiful. I condition my hair first, then. Shampoo with my regular shampoo, then I put on the triple bright (I have longer than shoulder length hair thats very thick and i only needed one pump) and left it on for 3 minutes and rinsed. My hair feels soft and looks beautiful. For me, I try not to buy hair care thats too expensive, but this is well worth the price. I’m glad I tried it. For my natural white and my natural dark hair, it worked amazingly.
Miss SVerified purchaseHelpful (6)
★★★★★June 14, 2026
BEST Purple Shampoo EVER!
I've been searching and searching for a purple shampoo for years and this is probably the best purple shampoo I've ever used on my highlighted hair. It's extremely purple and a mousse consistency. I leave it on for 2-3 minutes and then wash it out. My color stays refreshed and amazing!
GSVerified purchaseHelpful (5)
★★★★★June 17, 2026
K18 TripleBright is a game-changer!
This K18 Triple Bright is a game-changer! I have been struggling to find the right purple shampoo that doesn't turn my hair purple. My hair always absorbs the extra pigment, but not with this K18! My hair is brighter and the yellow tones disappeared without turning me blue or purple. My hair is softer and it looks great. Very happy with this purchase!
William SchirmerVerified purchaseHelpful (5)
★★★★☆June 19, 2026
Great for removing brassiness
I shampooed first with my normal shampoo bc I had a lot of styling product and then went in with this on my bleached platinum blonde hair. It is a very convenient foam that spreads easily throughout the hair. Because my hair is so light I only left it on for 2 minutes and it left my color bright and vibrant. I will say though that like other purple shampoos it is drying to the hair. I rinsed it out, towel dried and then applied my k18 leave in mask and it made my hair soft and shiny as it usually does. Overall pleased with this product.
Stephanie L.Verified purchaseHelpful (5)
★★★★★June 8, 2026
Love k18 takes the brassiness out
Had very brassy hair. I bought this bc their other priducts are so great. Pump out enough to shampoo ur hair leave on three minutes. I used my K18 treatment also. Air dry or hairdryer and brassiness. I think u will be pleases.hair is moistured, soft and not brassy
No powerVerified purchaseHelpful (3)
★★★★☆July 6, 2026
You will need a good conditioner
I would have given 5 stars if my hair didn’t feel brittle afterwards. This product was extremely effective at removing the brassy honey hues from my blonde hair.
Plush80sVerified purchaseHelpful (2)
★★★★★June 7, 2026
Top 1
This is the best blond shampoo I’ve had . I have tried all of the top brands and this is the best. I will keep this as my go to. The last visit to my stylist was trying to get my brassy blonde out it’s hard with toning I came home and washed my hair and it’s freaking gorgeous!
DianeVerified purchaseHelpful (2)
★★★★★June 24, 2026
African Americans with BLOND hair…a MUST HAVE!
Keeps my bleached hair a BEAUTIFUL BLOND… I’m African American and I love how my “ paid for” Platinum color is STAYING Platinum… use weekly to keep that awful yellow color at bay. A GREAT PRODUCT. Dont waste your money on the purple shampoos you can buy at your local stores… This is the ONLY product you will need In a Pump bottle so you don’t waste any product… We spend a LOT of money as people of color getting blond… protect it.
sheila blanco pedrosaVerified purchaseHelpful (2)
★★★★★July 17, 2026
Removes sediment
This shampoo is too be used every week to week in a half. The water where I live turned my hair brassy. This shampoo removed deposits and more my color is the way I want.
Audrey NevinsVerified purchaseHelpful (1)
★★★★★July 22, 2026
You won’t regret this purchase!
I noticed a difference right away after the first use. As salt and pepper hair and removed any of the brassiness that may have been there. My hair felt soft and shiny. It was easy to use. It smelled amazing. I would highly recommend. It’s worth every penny.
JobingoVerified purchaseHelpful (1)
★★★★★July 20, 2026
Works excellent!
Love the K18 products! This shampoo is awesome to get rid of brassy or yellowing hair. Best purple shampoo I’ve tried. Honest review not a free product endorsement!
ann marie kellyVerified purchaseHelpful (1)
★★★★★July 1, 2026
Best Puple Shampoo
Better than any purple shampoo or toner. Removes all brassy tones in the first wash. Left my hair healthy and manageable.
PambelinaVerified purchaseHelpful (1)
★★★★★July 2, 2026
Definitely worth the price
Amazing results with just one wash.
Socretes12Verified purchaseHelpful (1)
★★★★☆June 17, 2026
Worked well, but allergic to something in it.
Worked well for my color, but made my head itch. Allergic reaction to something in purple shampoo
DonnaVerified purchaseHelpful (1)
★★★☆☆July 6, 2026
Not want I expected
Really did not notice a dramatic differnce as the product claims. It is OK , I will no buy again
LrVerified purchaseHelpful (1)
★☆☆☆☆July 23, 2026
Not a good product.
It left my hair feeling terribly dry. I wish I hadn't tried it, too expensive for such a small amount.
Patricia JuhrendVerified purchaseHelpful (1)
★☆☆☆☆July 20, 2026
Very drying to your hair.
I have very fine and very thin silver gray hair. K18 made my shiny soft hair like dry straw. I had to use Olaplex bonding and lots of conditioner to get some moisture in my hair again. I used the K18 because I had some yellow oxidation on my top layer of hair. It did help the color but ruined my hair texture and shine. I can not recommend this product.
Jim B.Verified purchaseHelpful (1)
★☆☆☆☆July 4, 2026
not for me
my was stripped of its color and very dry.I had to put a toner on,need to go to my stylist!
JoyHelpful (1)
★☆☆☆☆July 12, 2026
do not use it
I used it according to directions and ended up with ash grey hair
Luisa F.Verified purchaseHelpful (1)
★★★★★July 13, 2026
Works on blonde hair with dye
We dyed part of my daughter’s blonde hair with a turquoise Manic Panic semi permanent without bleaching it first since her hair is pretty light. Since it had yellow to it the turquoise turned a bit green. She still likes it, but now moving forward we are using this shampoo to help combat the brassiness and keep it a bit bluer. Our water is super hard here and even with a water softener it does make her hair brassy. Since there are no sulfates, it works for her hair with minimal fading and helps both the dye and her natural blonde.
SamWFree product, given for review
★★★★★July 14, 2026
Would recommend !
This is my first time trying K18 after everyone told me they swear by it. I would definitely recommend my hair was just kind of brassy and had a yellow tint ! Made my hair feel soft compared to other purple shampoos !!
KellyVerified purchase
★★★★★July 11, 2026
Noticeably different
I was skeptical but even after using it one time, I noticed a difference. The water here always turns my hair brassy over time even if I use purple shampoo, highly recommended!
RuckusVerified purchase
★★★★★July 24, 2026
Blonde hair
Good product for blonde or grey hair in a red dirt water
Emily E StricklandVerified purchase
★★★★★July 22, 2026
Great product!
I have short white/gray hair and very hard water. I have used other purple shampoos, but I still always got an odd color on the back of my head which my stylist would cut off each month. She got this shampoo for me last month, and it works great! It removes metals and minerals and also prevents minerals in hard water from reattaching. I use it once or twice a week. One pump is always enough. My stylist commented that the color from the water didn’t happen this month. That is the first time in twenty years!
JJ
★★★★★July 2, 2026
It works
Working out good . Happy with my purchase
abundanthealth714Verified purchase
★★★★★July 10, 2026
Worth it if you have rusty well water!
Wow. I was not expecting this stuff to work as well as it did! Pricey but worth it if you have lots of minerals in your water. the brassiness was gone on the first use and it looked like I had fresh highlights again!
em90Verified purchase
★★★★★July 13, 2026
Get the orange out
My hair turned orange from a pool and this really helped get the orange out
dcahneiVerified purchase
★★★★★July 19, 2026
Will repurchase
I was skeptical, but this stuff is amazing!!!?
Tonya TurnerVerified purchase
★★★★★July 11, 2026
Your hair will like k18 products
Works good
barbaraVerified purchase
★★★★★July 5, 2026
Works perfectly
Truly works! I am all about natural and healthy hair products. This shampoo is a must. I noticed a difference in my hair after 1 use. Will continue to buy
Randi L.Verified purchase
★★★★★July 8, 2026
beautiful platinum
Really work excellent
Gema RodriguezVerified purchase
★★★★★July 12, 2026
Good product
Has really helped extend the life of my highlights and kept them from becoming brassy between appointments. My color and highlights look salon fresh much longer than it used to. It may seem a little pricey for a small bottle, but it's worth it because it's going to end up paying for itself by decreasing the frequency of my trips to the salon. It also seems to help my processed hair by moisturizing it well and returning that soft feeling to it.
J DuncanFree product, given for review
★★★★★July 17, 2026
Recommended by my stylist
Foam…lathers well.
Shannon RyanVerified purchase
★★★★★July 7, 2026
It works great
Wow, this is actually really impressive!
ApplesVerified purchase
