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Scalp scrubs are gel-like exfoliators designed to purge the scalp and hair of product buildup and dead skin cells, leaving hair looking refreshed. If you're a scrub junkie and you love to rub-a-dub-dub, you're probably intrigued. But wait. "Scrubs can irritate the scalp's delicate skin—especially if you have dandruff—and the scrub's particles can break the hair," says Philip Kingsley, a New York City trichologist (hair specialist). Any shampoo will clean your hair and scalp effectively, says Christopher Mackin, a resident trichologist at New York City's Gil Ferrer Salon. But if you think you need a power wash, use a formula containing eucalyptus, because it's an excellent clarifier, he says. And while you're shampooing, massage your scalp with your fingertips, which increases blood flow (promoting healthy hair growth) and lifts dirt and oils off the scalp.
— Jessica Matlin