Is there a connection between diet and acne? There have been discussions about the relationship between acne and diet for a long time, and there is some truth here, says dermatologist Ekaterina Velsova. There is evidence that acne is linked to foods with a high glycemic index, such as sweets and sugary drinks. Such products are quickly absorbed, and cause a sharp jump in the blood glucose level. "In response, the pancreas releases insulin, and together with it the level of insulin-like growth factor (IGF-1) increases. This hormone directly stimulates the sebaceous glands: they start producing more milk, pores close faster and inflammation increases," says the expert.