5.0 out of 5 stars I was skeptical, but it did what it promised!

S.F. · May 28, 2025

(function() { P.when('cr-A', 'ready').execute(function(A) { if(typeof A.toggleExpanderAriaLabel === 'function') { A.toggleExpanderAriaLabel('review_text_read_more', 'Read more of this review', 'Read less of this review'); } }); })(); .review-text-read-more-expander:focus-visible { outline: 2px solid #2162a1; outline-offset: 2px; border-radius: 5px; } I don't usually review these kinds of products, because I never see the “miracle results” they rave about. My hair is bleached, damaged and fried at the ends and I was hoping to find something to save at least a few inches of it, so that I wouldn’t have to chop a ton of it off. I swore by the gold standard of Olaplex no. 3 and used it every week for hours at a time, even sleeping with it in, but it only had modest results.This product seemed way overpriced and the instructions too good to be true…just leave it on for four minutes and that’s somehow enough time to work? No conditioner after? But I finally bought the small bottle and tried it. It is TINY and I have long hair and can maybe get two uses out of the bottle, but it did WAY more for my hair than Olaplex! In fact, I got better results from this tiny little bottle than I did from several months of 30$ Olaplex bottles, so this saved me money.Last night I showered, blotted my hair dry thoroughly with a towel, then combed the product through and waited, before applying a spray leave-in conditioner just in case. I blow-dried it with protectant gel in and styled it as usual. It looked much better immediately after. Today I woke up and my ends are AMAZING. They’re not virgin hair by any means, but they finally look much softer and healthier, not bleach-damaged! All my hair feels much softer and looks shinier.Frankly I’m stunned this actually worked so well, and immediately came back to buy the bigger bottle. If continuing to use it produces even more results, my hair will go from bleachy damaged mess, to soft and amazing, and I couldn’t be happier. It’s expensive as heck, but WORTH IT. If you have damaged, bleached hair, buy this.

5.0 out of 5 stars Fixed My Bleached Hair in One Use – Actual Hair Resurrection

C.E. · May 27, 2025

LITERALLY SAVED MY HAIR IN ONE USE – MIRACLE IN A BOTTLEI don’t usually leave reviews, but I would actually fight someone over this product if it ever got discontinued. Like. That’s how serious I am. I bleached the living life out of my hair recently—think straw, think crunchy ramen noodle ends, think “oops I fried it but I still want it to look good.” I used K18 once, and I swear to god my hair looked like I had never damaged it at all. ONE USE. Not three. Not six. One.This isn’t your average deep conditioner or protein mask. This is full-on biotech magic. The science behind it is real—this isn’t marketing fluff. It uses a patented peptide (K18Peptide™) that literally reconnects broken polypeptide chains in your hair. Like, it doesn’t just make your hair feel soft temporarily. It rebuilds it. We’re talking actual molecular repair. You feel the difference IMMEDIATELY. And even better? The results just get better the more you use it.No rinsing, no long routines. You just shampoo, skip conditioner, towel-dry, use 1–3 pumps depending on your hair length, and then wait 4 minutes. THAT’S IT. It absorbs fast, isn’t heavy, doesn’t make your roots oily, and doesn’t coat your hair in a waxy film like other products. My hair went from stringy and dead to soft, bouncy, shiny, and fully alive again.Also? A little goes a long way. It’s expensive, yeah, but it lasts forever and genuinely does what it says. I’d rather spend money once on something that works than keep buying cheap products that do nothing but mask the damage.TL;DR – If your hair is damaged from bleach, color, heat, or just life, BUY THIS. It’s not hype. It’s not overrated. It’s the best hair product on the planet and deserves to be in every single “best of” list forever. I’ve tried Olaplex, I’ve tried everything—nothing touches this. K18 is THAT GIRL.

5.0 out of 5 stars The Mask is a Hair Game Changer.

S. · June 15, 2025

GAME CHANGER I have 3C and 4C Curly hair. Lucky me LOL. My hair tangles easily. My hair likes to break. Let me be clear. When I find a product that works it is difficult for me to try something new. I use Dove Anti Breakage shampoo. I use the TGIN Hair Mask as a styling product. The product works on my hair. BUT K18 hair mask - my hair is no longer breaking. My hair is for the first time in 30 years healthy, strong and pass my shoulders. Yes I trim my ends. Sometimes. Yes it is a little expensive but I don't purchase hair products I don't need. I take my lunch to work. I use that money to invest in this product. Yes, I have to be intentional but my hair is thick, strong. And I love it. Lastly, this is not a paid review nor did I receive free product.

4.0 out of 5 stars Pricey!!! But seems to work after only one use!

W.a.M.o.4.b. · May 5, 2025

Not using conditioner when my hair is so damaged seemed crazy! I usually put quite a bit of conditioner on my hair to be able to comb through it.I bought the bigger size and it’s REALLY small for the price. I saved a little money by choosing “subscribe and save”... I used the shampoo, 3 pumps of this & 4 drops of the oil. Surprisingly with only 3 pumps I was able to get my brush through easily! It didn’t look like enough. Nor did my hair instantly feel smooth when applying. So definitely wait the 4 minutes before combing it through.My hair is fairly thick, about 1/2 way down my back and I recently bleached it from my natural brown to blond. I bought the shampoo/ conditioner & oil. My hair is so damaged after bleaching it. :( I’ve tried several recommendations to get it healthy again. Mondo & others haven’t worked. So I was up to try this!It felt softer after using it for the first time! There isn’t much scent and my hair isn’t greasy. I’ll use it 4-6 more times and hopefully my hair will look much healthier as promised. I live where it’s fairly humid. If this works well for that, it'll be worth it!

5.0 out of 5 stars Miracle worker!

J. · June 14, 2025

Like other reviewers have said, I was very skeptical that this would work but after first use I liked it a lot and now on my 4th use I don’t think my hair has ever felt/looked in better condition. I have bleached hair which was so dry after last highlights I thought it was beyond repair but this really works. I condition after applying this and waiting 4 mins and rinse after. Amazing is all I can say. If considering it, it’s worth a try, despite high price tag - if it works for you like it does for me it’s so worth it!

Love it

M.A. · November 3, 2024

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Watch videos on lathering before use!

r. · May 19, 2025

Second purchase now, and is impressive when using and left in hair as recommended. Styles well, and leaves hair soft and silky as opposed dry and bushy. However, the next day you would never know, so undecided if would purchase again a third time.

Good but tiny

S. · February 15, 2025

Fake!!! Do not buy

S. · July 24, 2024

This is a fake. There are certain ways to check by the packaging if it is the real k18. Do your research. I thought the price seemed too good to be true. Well, it is!

it arrived before than expected

c.z. · September 1, 2023

perfect package