A calorie is a unit of energy. In nutrition, calories refer to the energy people get from the food and drink they consume, and the energy they use in physical activity. Calories are the amount of energy released when your body digests and absorbs food.
How many do I need? The average man needs 2,700 kcal per day and the average woman needs 2,200 kcal per day. The number of calories a given individual needs will depend on metabolism and activity. Calorie consumption that is too low or too high will eventually lead to health problems. When you eat more calories than you need, your body stores the extra calories as body fat. Without energy, the cells in the body would die, and the organs would not be able to carry out the basic processes needed for living.
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