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K18 = Sephora

K18 Biomimetic Hairscience

Get hair like new* with K18's biology-first haircare, designed to make the impossible possible.

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Reviews

4.3

4,944 Reviews

5

4

3

2

1

3300

746

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Recent Reviews

Zahraa

5

3/21/2026

The hair health allegations checks out!!!

I bought this after I kept hearing about k18. I was skeptical about this product due to the claims but after using it consistently for 1 month I can confirm my hair is softer , more moisturised and shiny . My hair texture overall has improved drastically ! A staple leave in in my hair routine

Originally posted on Sephora-uk

Fiorella

3

3/21/2026

Recommend the small size

Hard to tell is this product actually works. There’s mixed reviews of how to even apply it. On the box it says not to condition your hair after use , which would effectively leave your hair super dry (specially for recently bleached hair). But then on their official website’s forum they say it’s ok to condition after the four minutes. I don’t notice a difference when I use it. Could be working , but could be a gimmick.

Originally posted on Sephora-uk

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