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Microdermabrasion uses fine crystals made of aluminum oxide or salt to loosen the outer layer of dead skin cells, which are then vacuumed up by a suction device. It's not really the abrasion of the crystals that produces results, it's the suction. The better the suction, the better results you'll get in terms of improving the moisture barrier and collagen synthesis in the skin. That's why it's best to go with an in-office procedure if you can. If you can't seek professional help just now, refine the skin's surface and boost its radiance by exfoliating two or three times per week with a gentle at-home scrub.