We tested the salon-loved K18 hair mask to see if it really holds up to heat- and color-damaged hair. Spoiler alert: It exceeded our expectations.

The algorithm really said, "You don't need to scrub that silly shower anymore," and put this weekly shower spray on your feed ...

Hey friend, ever stared at endless shampoo bottles and wondered, “Do I really need all this stuff?” Dr. James Hamblin, a Yale ...