Since calorie is a measure of energy, so what does it mean when, for example, alcohol, having “empty calories”? What kind of energy is being measured here?
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The purpose of food is for your body to receive energy and nutrients.
Calories are energy.
Nutrients are things like carbs, protein, fats, vitamins, minerals, and other compounds that your body uses for its functions.
When you say “empty calories”, you typically mean that it’s a caloric food, but doesn’t have a meaningful amount of useful nutrients.
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