Dry shampoo is a type of hair product that claims to reduce oil, grease, and dirt in your hair. Unlike wet shampoos and conditioners, dry shampoo can be applied to your hair while it’s dry — hence the name.
Dry shampoo doesn’t need to be washed out of your hair, and it’s typically applied to the crown of your head and other areas where oil and shine may visibly collect.
Some people swear by dry shampoo for touching up hair after a sweaty workout or extending the life of a salon blowout.
This article will cover the science of dry shampoo, list some popular products, and take a look at how dry shampoo compares to lathering up your locks in the shower.
How it works
Your scalp is covered with hair follicles. These follicles don’t just sprout hairs. They also produce sebum, the natural oil that softens your scalp and gives hair its texture.
Sebum serves an important purpose. It softens your hair and helps protect the skin underneath it. But when you’re working up a sweat, spending time outside, or even going about your day-to-day, oil and sweat from your scalp collect in your hair.
While a certain amount of oils on your head is normal, oil buildup gives your hair a greasy appearance.
Washing, blow-drying, and styling your hair on a daily basis can be time-consuming. Plus, it might not even be good for the health of your hair. That’s where dry shampoo comes in.
Dry shampoo uses alcohols or starch-based active ingredients to soak up the oils and sweat from your hair. Removing the oils from your hair makes it appear cleaner. Most dry shampoos also include a fragrance, which makes your hair smell fresh between washes.