The newest drugstore solution to your acne is…a Stormtrooper-esque mask studded with blue and red lights. It sounds improbable—if not Instagram-worthy—to say the least. But the science behind the Neutrogena Light Therapy Acne Mask, which came out this month, is entirely legit. “Blue light excites chemicals within acne-causing bacteria to the point of death,” says Brian Zelickson, a Minneapolis dermatologist.
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