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K18 Biomimetic Hairscience
Get hair like new* with K18's biology-first haircare, designed to make the impossible possible.
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Reviews
Recent Reviews
mzgray
Verified Buyer
5
1/27/2026
I was a skeptic but now I am a believer!
I was extremely apprehensive about trying k18 leave in mask because to me it was “overhyped” in the same manner that Olaplex was, but I decided to give it and try and I am throughly impressed by how different my hair feels in such a short time. I started to give 4 stars because the price is insane, but it works so it deserves its 5 stars.
Originally posted on sephora.com
fantasticmrfox
5
1/23/2026
My hair cannot live without this stuff. Does your hair stick straight out when you hold the tips? It won’t after this! Your hair will cascade down like a waterfall. I recently ran out and notice a huge difference. So expensive but worth every cent.
Originally posted on sephora.com