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I suspect that what you are actually looking for is the following: - 1 gram of fat = 9 kcal - 1 gram of protein = 4 kcal - 1 gram of sugar = 4 kcal - 1 gram of alcohol = 7 kcal Those are general and inexact values. They're just often used to give a rough idea of the amount of energy we get from different types of food.



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