K18's Leave-In Molecular Repair Hair Mask did just that, emerging in late 2020 as the new ‘It' girl of at-home hair treatments. The K18 hair mask is a leave-in formula designed to reverse damage ...

But here’s the thing: Hair volume products are historically kinda finicky, IMO. This is exactly why K18 AstroLift Reparative Volumizing Spray was created. Typically, volumizers like mousses ...

To keep my hair fresh and to truly test K18’s hair-renewing product, I didn’t wash my hair the night before or the morning of. Instead, I let my blowout from the day prior do its thing.

Hailey Bieber swears by the K18 viral hair mask and now the brand has launched two new shampoos. Here are Team Stylist’s honest thoughts on the K18 hair range. With a long list of scientific ...

How? It’s loaded with K18’s patented peptide blend, a combo of 123 amino acids, which helps strengthen hair and repair broken bonds at the molecular level. But it also helps make your hair look ...