42 Reviews

K18 sells peptide hair care products to reverse hair damage.

What is Thingtesting?

Thingtesting is an unbiased place to research and review internet-born brands — because honest reviews help us all shop better. Learn more.

Average rating from 2 users

K18 Reviews

2 months ago
📷Influencer for K18

Being a hairstylist and in the beauty industry for years, I am always a sceptic on brand claims. The first time I used K18 mask, I was shocked and wondered what magic was in this bottle. This client came to me for the first time, and she blow dried and flat ironed her hair every single day. Her hair had so much breakage on the ends, but I tried the professional mist + mask. After her color it was the bounciest and shiniest I've ever seen. Ever since then (January 2021) I have been a firm K18 believer. I am part of the stylist collective, but my first year using them, I had no affiliation. Everyone from bleached hair, permed, relaxed or even virgin hair can benefit from the K18 mask. It helps repair damage from heat, chemicals, mechanical styling, and pollution. The new shampoos are outstanding. The detox cleans the scalp so well, I can go an extra day without shampooing. The pH maintenance gives such a lovely lather and feel great too. I am so grateful to have K18 behind the chair. I have been able to take my clients' hair beyond what would normally be possible with no damage.

High qualityInnovative productWorth the money 💸
Useful review?
2 months ago

I had received a free sample of the k18 leave in conditioner and I LOVED it so I purchased the full size. Not sure what happened to the formula. It didn’t seem to work as well and it weighed down my hair after only one day. The full size doesn’t last that long and it’s very expensive.


Larger bottles, more product.

Innovative product
Useful review?