I have bought it many times from various sites but this time it had a different texture. The composition of the product was like an imitation. I'm sorry but you need to clarify things with your partners.

It is very rare for me to leave a negative review on a product, but I truly believe this one deserves it! I have been using it for about 2.5 months, on balayage hair that is not particularly damaged at the ends, and yet I have not seen any difference at all! I decided to give it some time, but honestly, this is the worst money I have ever wasted! Of course, I use it exactly according to the instructions and still, it is completely disappointing! I would recommend the equivalent from L’Oréal a thousand times over, which is also cheaper and actually works! Fortunately, I bought the small package to try it out first. Note that I do not have thick hair, I have normal hair with split ends due to the balayage technique. Really, do not spend your money here, invest in something else.

Incredible product! From the very first use I saw a huge difference!! My hair became softer, stronger, and looked much healthier. It reduced frizz and they look as if they have recovered after damage (dyeing, bleaching, etc.). It doesn't weigh them down at all and leaves a very nice feeling. It is definitely worth the money and I will buy it again.

I have bought the smaller package and it was a very good treatment! However, the 150 ml package has a different texture and does nothing for my hair. It's as if it's not the real K18 treatment that I have tried before.

It truly is worth every cent! With this, my hair was restored, it offers incredible hydration and you can notice a difference already from the third use! It's worth investing in if your hair is damaged from bleaching and treatments! I will buy it again and again...

The only mask with which I have seen a difference in my fine, curly, damaged hair. The large packaging is also cost-effective because it lasts me for many months (used once a week).

I like it very much! I have done my hair with K18. I will buy it again when the first one is finished.

I started it on February 27 (almost every other day) and the photo is from today, March 16. Before I started using it, I had cut off all the split ends from my hair (5 fingers' worth of a haircut). I give it 2 stars only because it moisturizes the ends well and makes the hair silky, but the breakage stayed exactly the same and absolutely nothing changed.

The large package was like a completely different product from the small one. I can't explain it, as if it didn't have the same composition

I have lots but fine hair, and regular bleaching to keep my hair platinum blonde came with the price of damage and dryness. Been using K18 for more than a month now and my hair feel stronger and look healthier. I would recommend this mask to someone who needs a good repair product.

I have medium length hair with bleach and I use it once a week with only one pump. I rub it in my palms and apply it to the ends. The texture of my hair has improved incredibly and after blow-drying it doesn't frizz at all. I will definitely buy it again. It is a very honest treatment for home use.

There are no words for this product! Fine hair with bleach that, when it grows, gets split ends without me using straighteners etc., in short, very sensitive hair. I got this product, the travel size for a trial, and I did as instructed, that is, six times, and it lasted for me with my short bob hair. While until the fifth time I hadn't seen anything, the sixth time my hair was transformed—I couldn't believe what I was seeing. 100% repair, the split ends were gone and my hair looks healthy. Incredible result, I will buy it again!

with my hair in terrible condition and with this product it gave body to the hair I will definitely buy it again

I have fine hair and I have used it only 2 consecutive times, following the instructions. I think that from the first application my hair looked fuller at the ends. Somehow thicker. The result was amazing. Of course, the second day after applying it, I think my hair feels slightly heavier but I’m not sure if this is the cause. Anyway, from the first moment it somehow filled out the ends. I will update after some more time passes! I got the 15ml because I didn’t know if it was worth it and still it was a very expensive product for such a small amount. You just don’t need to use a lot, I mean I have medium-length fine hair and I use 2-3 pumps from the 15ml bottle.

Very moisturizing leave-in conditioner.
My hair is wavy, naturally dry, and high porosity.
It's one of the few products that doesn't weigh my hair down but moisturizes it just enough and helps with better curl formation.
I apply 2 pumps and rub the product in my palms until it turns white and then spread it on the ends.

THIS PRODUCT IS FAKE! It’s counterfeit! I have bought the K18 from the official store and used it for over a year. This product does not smell like the original (it smells like gasoline) and it doesn’t have the same creamy consistency as the original (it is more watery). I requested a return because it is FAKE and the store has the audacity to reject my refund request because they claim it’s not fake. WHO ARE YOU KIDDING?! Don’t buy it!!!! Selling counterfeit products is ILLEGAL.

This is an excellent product. It is expensive, but it restores hair that has suffered a lot of damage and destruction. Personally, my hair was in terrible condition after highlights from a hairdresser who didn't know how to do her job. With the first use, the difference is huge and noticeable. The hair no longer looks sick, frizzy, and burned from chemical processes. I highly recommend it if you have a serious problem. It is worth its price.

The best! My hair has undergone many bleachings. Broken and thin, I reached a point where I said ok, this can't go on, you have to do something. So I bought the travel size with hesitation due to the cost to try it out. I followed the instructions and saw a huge difference. It is not a superficial smoothing product. It doesn't require frequent use or a large amount. It doesn't turn your hair "natural" again but it is the best I've tried. It lasted 5 months. I will buy it again.

If there were 10 stars, I would give them...perfect product..it saved my hair after bleaching and straightening...it needs to be used with care!!

It works on a molecular level. You won’t see the difference right away but consistency wins long term.

In general, this product has years of research and a lot of science behind it. On my own hair, which is not particularly damaged, it worked perfectly. You shouldn't use it often, especially if your hair quality is not in bad condition, but it is a must regardless and it is the secret to healthy long hair.

It does not provide treatment to the hair. The hair does not get untangled. If I don't use another product as well to soften and detangle the hair, it cannot be combed.

After a burn due to over an hour of bleaching at the hair salon, my hair looked like a wig, I freaked out and was ready to shave it all off.
I tried K18 and honestly, after just 2 applications, it looks MUCH better.
It is visibly healthier and consequently the color looks more vibrant.
Because it works in depth and reconnects peptides.
I don't know how it will be when I stop using it, but for now I am extremely satisfied!

You need to use it about 6 times to see results... Also, for my hair which is below the shoulders, it takes 3-4 pumps... I will definitely buy it again, my hair has become very nice without split ends

Fantastic for hair reconstruction. It does not give a feeling of softness and hydrated hair, but it does the job of rebuilding

I bought it because I’ve heard it’s miraculous
I haven’t seen anything yet
With Olaplex I see better results
Whether I use it or not, it’s the same! Time will tell in the future

It offers amazing reconstruction and prevents split ends. My hairdresser asked me what I do to have such healthy hair …;!

For my fine and very dry hair, it was not good at all; it became more unruly, frizzed more, and was not easy to comb. Totally useless!

I got it after the positive comments on social media and here, but my damaged hair didn't benefit from it even a little. I followed all the instructions diligently (yes, I rubbed it between my hands until it turned white, etc.), but the result was zero. For other girls, it might work, I don't dispute that, but for me, it was absolutely nothing.