May sports drinks also contain the carbohydrate fructose which in some studies has been linked to an increased risk of heart disease. When choosing a sports drink, it is best to avoid one that has fructose or high fructose corn syrup listed as an ingredient. Many sports drinks also contain caloric acid which has the potential to erode tooth enamel. For this reason, you should drink a sports drink with a straw as quickly as possible to avoid prolonged contact of the liquid with your teeth.