Answer:

Every time we talk about food it seems we also talk about calories. Calories, those numbers found on nutrition fact labels and what diets tell us to watch. Calories are really the measure of how much energy is available to our bodies from what we eat. Every calorie is the same, whether it comes from legumes or lard. We burn calories from food when we perform any activity. When we eat more calories than we burn, then our bodies happily store the remaining calories as fat. Each pound of fat stores about 3,500 calories. How many calories you should have each day depends on many things, from your level of activity to your age and desired body weight.