Sports drinks may have sugars, but they don't offer much in the way of nourishment. They increase calorie intake. Sports drinks may thus cause weight gain if you don't exercise for a long time or vigorously. Additionally, the sugar in these beverages may cause tooth issues. Sports drinks sometimes include sugary carbohydrates in addition to electrolytes, minerals, and occasionally protein, vitamins, or caffeine. They are available in many flavors.