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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

4.7

236 Reviews

5

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1

207

13

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Recent Reviews

Giavanna08

Verified Buyer

5

5/31/2026

Perfect for blondes that get yellow

I first apply this in my wet hair in shower, then I add my regular shampoo & let sit for 4 minutes. it does brighten my hair. I make sure to use a conditioning mask & leave that in for 4 minutes because I find purple shampoos tend to dry my hair.

Recommended

Originally posted on sephora.com

tg123

5

5/23/2026

Amazing!!

My results speak for themselves.. see attached picture. if you’re not liking this, you probably aren’t like the feeling of your hair once you removed all the product that’s been coating it. Try the k18 repair mask with it…

Recommended

Originally posted on sephora.com

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