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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.

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 ...

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 ...