If you have acne, avoiding high-glycemic carbohydrates may help, according to a review article on the diet-acne connection published in the Journal of the American Academy of Nutrition and Dietetics in March.
Over the decades, many foods have been blamed for acne, with little or no clinical research to support the link. The new article concludes that the best evidence, while still limited, concerns foods with a high glycemic index, such as refined grains and sugary foods.
Several small studies in recent years have suggested that such foods can worsen or increase acne outbreaks. These foods are quickly broken down into sugar in the blood and raise insulin levels, which in turn may increase production of hormones that can affect acne.
Still, there’s no evidence that these foods cause acne, only exacerbate it.