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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

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4,747 Reviews

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Recent Reviews

Lisssss11

4

10/5/2025

Hair transformation in just a few uses!

I’ve tried many repair masks and leave-ins over the years, but K18 truly stands out. My hair is color-treated, slightly dry, and tends to break easily, especially after lightening. After just two uses, I noticed a huge difference, my hair felt stronger, smoother, and looked noticeably healthier without feeling heavy or coated. I love that it works quickly (you leave it on for only 4 minutes) and doesn’t require rinsing afterward. A little goes a long way, so even though it’s pricey, the bottle lasts a while. If your hair has been damaged from coloring, heat styling, or bleach, this product is worth trying. It’s like a salon repair treatment at home. Hair type: Fine to medium, color-treated Concerns: Damage, dryness, breakage Location: Florida Would I recommend it? Absolutely yes!

Recommended

Originally posted on sephora.com

NA

Age: 25 to 34

5

10/2/2025

Worth the hype¡

The best you could add to your damaged hair. Very hydrating and you can feel the difference from the first use Totally worth it

Duration of Use: 3 months

Recommended

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