Dry shampoo is not new
Dry shampoo is having a moment—one beauty editor famously wrote that by week’s end, her hair is 90 percent dry shampoo—but it’s actually been around in some form or another for centuries. (There’s some evidence that people in Asia were using clay in their hair thousands of years ago.) Even the dry shampoo we know today got its start sometime in the 1940s, when it was primarily known as Minipoo. These days there are over 50 varieties of dry shampoo on store shelves, and many do more than just salvage a blowout or disguise a missed shower. For example, if you’re looking for cool-girl body and texture, there’s Kérastase Couture Styling Powder Bluff. For fine strands, there’s Alterna’s Cleanse Extend Dry Shampoo, a lightweight spray that won’t weigh hair down even on the fourth day after your blowout. Klorane Dry Shampoo with Oat Milk Natural Tint has a formula made for brown hair to ease the process of blending out any residual white powder. If you’re looking to get out the grime rather than just mask it, Living Proof Perfect Hair Day has little molecular sponges that soak up oil, sweat, and odor, so you can whisk them away when you brush.
Dry shampoo is not actually shampoo
Despite its name, dry shampoo is not a hair cleanser. Unlike regular shampoo, which is formulated with water and cleansing agents that rinse away oils and impurities, dry shampoos are mostly made up of alcohol, starch, or clay (spray versions) or clay, talc, and starch without the alcohol (powder versions), according to Hien Nguyen, cosmetic chemist and co-founder of Function of Beauty, a start-up that offers customized shampoos and conditioners. With either type of dry shampoo, the porous ingredients work by soaking up excess oil, which is what breathes new life into yesterday’s blowout or your sweaty strands after hitting the gym. (For super-sweaty post-workout hair, we like Elizabeth and James Nirvana White Dry Shampoo—it has micro powder enriched with natural rice starch to absorb oils while adding a mist of its most addictive scent. Check out the things your hair is desperately trying to tell you.