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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

857 Reviews

5

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Recent Reviews

Deni̇z

5

2/16/2026

it works

I use this product together with its matching shampoo, and I absolutely love the results. The hydration is amazing, and it leaves my hair feeling incredibly soft. I’ve noticed that my hair is less frizzy, smoother, and easier to manage. It looks more sleek and feels much healthier overall. I would definitely recommend it and will repurchase!

Originally posted on Sephora-uk

Molly999

Verified Buyer

5

1/27/2026

Never want to be without!!

Did wonders for my frizz prone, fine hair. Worth its weight in gold (even at today’s gold prices)!

Recommended

Originally posted on sephora.com

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