Unlock your gifts
K18 Biomimetic Hairscience
Get hair like new* with K18's biology-first haircare, designed to make the impossible possible.
Shop Now
Reviews
Recent Reviews
raeraes
Verified Buyer
5
10/14/2026
Great product!
Ok, so I didn’t want this to work because it’s pricey….but unfortunately it works really well! I have been going through a ton of health issues and changes. Between that my new medication my fine hair was looking even thinner. I have been using this for a month and my hair is already starting to look fuller, the thin spots are filling in, and overall healthier. K18 is run by wizards apparently.
Originally posted on sephora.com
eemilyannee
Verified Buyer
5
10/12/2026
Game changer.
This has changed the game for me. I think people forget that with any hair serum you have to go through an adjustment phase. You lose a bit of hair first, that’s the cycle before you gain hair. Old has to make way for new.
Originally posted on sephora.com