000 CALORIES. FOOD CALORIES ARE ALWAYS MEASURED AS CALORIES BUT AVER...

1,000 calories. Food calories are always measured as Calories but average people don’t care much about the difference and just use the word calories. Food is composed of proteins, fats and carbohydrates. Nutritionists know that a gram of protein contains 4 Calories, a gram of fat has 9 Calories, and a gram of carbohydrate has 4 Calories. All food contain calories. When we eat something it provides energy for our bodies to use when we are active. We even need energy or calories while we are sleeping because, for example, our bodies are still breathing, our heart is pumping, and we continue to digest the food in our stomachs. If a person eats more foodand more calories than is used up by activity, the body stores the excess calories in case it might need it later when food might not be available. So a person gains weight due to the extra food and calories. Similarity, if a person consumes fewer calories than are used every day over several weeks and ismore active, that person will lose weight.