What are calories? Is it the amount if energy in a food? How does the body uses calories, burns calories, and how does excess calories becomes fat?
Why are food “low in calories” good for you? Why are food of the same size, have different amount if calories?
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Certain types of food contain different amounts of calories because of the chemical composition of the food. For example, fat or oil is very high in calories per gram. Fiber and protein contain low amounts of calories so they don’t provide your body with much energy but they are important for other purposes. When the food is broken down in the cells the energy stored in the food is converted into usable energy for your body. Your body is constantly using energy for various functions, and your energy demands increase if you are active or growing. Moving your muscles, healing injuries, and forming new cells all use energy.
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