Leave-In Molecular Hair Mask, Repairs Dry or Damaged Hair, Reverse Hair Damage from Bleach, Colour, Chemical Services & Heat

Regular heat and bleach is used on my hair and was incredibly damaged. This helped to reverse the damage in 6 weeks and I now use it as maintenance once a week. It is very pricey but definitely worth the money if used correctly. Shampoo, towel dry hair, apply and wait 4 minutes minimum then condition as normal. I also use a hair mask after conditioner and my hair has never felt better.

Really helps damaged or dry hair. Fantastic product

I have used this once and the difference already is significant. My hair was fried after a disaster with a home colour and then colour correction, my ends were crispy and my hair was looking very sorry for itself. I worried about not conditioning my hair but it didn’t matter as the K18 made it feel fabulous, so soft and smooth. Yes it’s expensive but when the only other option it to cut my long hair off it is worth every penny. Hopefully with more use I will see even more improvement. Yes I definitely recommend this.

The worst product i ever tried especially given its price.

Admittedly I need a hair cut but this has definitely improved the texture and look of my hair. Is it a miracle cream? Mmmnn maybe not. Also did I need 12 pumps rather than 3? I absolutely did! This will not last me very long at all, hence the 4 rather than 5 stars. An expensive treatment for sure! My hair looks, feels and smells nice.

Fantastic product with the money

This stuff is a game changer in a bottle. It’s expensive, but worth it. You only need to use it once a week really anyways. Doesn’t leave my hair greasy but does a great job of making it feel brand new.

I'm really not sure about this product. I do, however, have opinions. Ultimately the jury's out about the benefits and healing treatment on the hair long term, I have a few more uses left. I think my thoughts (which are complicated) could best be summed up as pros and cons for brevity's sake. Pros: - I fried my hair trying to add an auburn sheen - I used to dye my hair a lot and should have known better than to try again, but I was not prepared for the frizz I unleashed! Since the 2nd-or-so K18 application, my frizz is a lot less (but NOT gone!) - My hair does feel very soft - Frying my hair drastically reduced my natural curls, K18 may have helped start to bring these back - however changing my conditioner may have changed that too. Cons: - Price. Much like Olaplex, I feel this is very, very overpriced for what you get. The changes are not THAT amazing, and the amount of product is criminal. - Packaging. £30 for a 15ml, which is in an air-tight plastic pump that you cannot open to get any product left in the tube. I'm fully willing to bet there's a lot of product wastage there! - Hype. Hype never does anything any favours long term... yes, I think it helped with my damage from dying, but nothing's a miracle product and YMMV as to how much this helps you or not, how much a difference it makes or not. Personally it did make a difference for me, but I still expected more from the hype. - Long term benefit. I'm not sure about the long term pros of this product. - Method. How you're meant to use this product is very strict and I don't think it will work that well if you don't follow the instructions. Personally, my hair NEEDS a good conditioner, so having to omit conditioner... not so great. Also they recommend using it for multiple washes in a row - my hair cannot go multiple washes with shampoo each time and no conditioner each time, no way. And then there's the cost of using it for each wash, multiple washes in a row! - Amount. Goes back to price. I don't have masses of hair but I do have thick, longish hair and I could not make the amount they suggest stretch through all that. I had to use more, and that gets £££ as you burn through product. Ultimately, it's not a miracle product. It's a fairly decent product IF you have hair damage from chemical/heat, but if you're battling with just frizzy/thirsty/etc. hair I don't think it will do much. I do think the amount it will help you varies from person to person by a lot. And I really do think rave reviews, hype and marketing oversell how beneficial this product is. It is very expensive for what it is, and I think if you know your hair type and needs and have time to research or money to try new things, you can get better products which, if not cheaper, are at least more targeted for what you specifically need. It is marketed as a long term use product which is just not accessible price-wise for many people, myself included, and I don't know if the benefits will get any better than what it has already done for my hair. But it did help with damage in my specific circumstances - not to a miracle level but to a noticeable level. If you have the disposable income AND have chemical/heat damaged hair, give it a go. I would not splurge on a big size to begin with though, and I would be very, very realistic about the results and cost-to-impact you are going to see.