Added sugars, also known as free sugars, are sugars added to foods and drinks during processing or preparation, as opposed to natural sugars which are present before processing and preparation. Medical consensus holds that added sugars contribute little nutritional value to food, leading to a colloquial description as "empty calories". Overconsumption of sugar is correlated with excessive calorie intake and increased risk of weight gain and various diseases. Individuals who consume 17–21% of their daily calories from added sugar are reported to have a 38% higher risk of dying from cardiovascular disease compared to those who consume 8% of their daily calories from added sugar.