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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

424 Reviews

5

4

3

2

1

285

69

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Recent Reviews

leeshi1

Verified Buyer

2

5/20/2026

Doesn’t work for straight hair; helps hair health

It did not at all add volume to my straight hair. I will say that since using my hair does feel healthier. Although, it’s hard to say if it’s the product itself or a combination of products I’ve been using to work on my hair health. Love the smell.

Originally posted on sephora.com

fastfun

2

5/19/2026

Didn’t like it

I wanted to love this product but it’s a no. It’s way too expensive and I wish I would have returned it. It caused my scalp to itch, my hair to frizz and no volume. I wouldn’t buy it again.

Originally posted on sephora.com

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