For decades, the connection between diet and acne has been dismissed as an old wives’ tale. But now researchers are revisiting the subject — and a new review of studies finds evidence that what you eat may have a bearing on the severity of your acne after all.

About 17 million Americans, and 80 to 90 percent of adolescents, experience acne, according to the paper, which appears in the March issue of the Journal of Academy of Nutrition and Dietetics.