How the energy value of proteins differ from that of fats

Carbohydrates, proteins, and fats supply 90% of the dry weight of the diet and 100% of its energy. All three provide energy (measured in calories), but the amount of energy in 1 gram (1/28 ounce) differs: 4 calories in a gram of carbohydrate or protein. 9 calories in a gram of fat.

Explanation:

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your body is trying to warm itself up. or more precisely, sensors in your skin send messages to your brain to generate heat to your body.