What is a calorie and why is it important to know how many calories there are in certain foods?
A calorie is actually a unit of heat energy. That’s right. We think of calories as just things that are in food and all foods have calories. But your body sees calories as energy and it’s energy to produce heat. And heat energy is what really fuels our body just the same way that gasoline is what fuels your car’s energy. Now all foods have calories and different foods have different amounts of calories. Calories are provided by fat, carbohydrate, and protein.
