According to N.Y.C Dermatologist, Francesca Fusco, it's how you prep your skin before working out-not how you clean it afterward-that prevents breakouts most effectively. "Wipe your face with a disposable cleansing cloth before you begin. Exercising with makeup on can clog pores and obstructs the normal production of oil, sebum, and perspiration." To mattify without causing zits, dust your T-zone with a tinted mineral powder like one from Colorescience.
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