Calories are a unit of measurement to describe the amount of energy in foods. Different types of food have different amounts of calories based on their levels of fats, carbohydrates, and proteins. Per gram of protein and carbohydrates, there are 4 calories. Fats offer 9 calories per gram. Doctors often warn against eating foods high in fat because, gram for gram, they have a higher caloric value. The human body only requires so many calories in a day, and any excess is stored in fat tissues on the body. An excess of fat in the body contributes to poor health and a risk for heart disease.
The average daily recommended caloric intake is about 2,000 calories for adults. But depending on your body mass (height and weight), age, and activity level, you may need more or less calories to provide your body with enough energy.
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