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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

4.5

1,146 Reviews

5

4

3

2

1

889

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Recent Reviews

ddmakeup

Verified Buyer

4

3/12/2026

Love it but fragrance..

Love this product! I’ve used it for a month now and my hair looks so much healthier: less frizz, shinier but not oily. Note: while the rec is 3 drops I use 6 and my hair is above shoulder height. My only real issue is the fragrance. Smells ok not strong but it is NOT a clean ingredient. Unfortunately that makes this a product that isn’t an option for people who want to stick to a cleaner lifestyle. While I love it I won’t be repurchasing.

Recommended

Originally posted on sephora.com

Unknown

5

3/11/2026

Couldn't maintain a healthy blonde without it

I have very long, icy bleach blonde hair but am naturally a mousy brown. Since using this daily for a few months my hair is thicker and longer because of less breakage. I'm on my 3rd repurchase and seriously would not be able to be as blonde as I am, with hair as healthy and long as it is without this. I run it through the ends of my hair almost daily.

Recommended

Originally posted on sephora.com

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