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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In lay terms, from a nutritional POV all foods have three properties
1. Calories – the amount of energy they have
2. Content – Macros(Carbs, fats, protein) and micro(vitamins and minerals)
3. Satiety – How much it fills you up (strongly related to its fiber content
Veggies have low calories, but high of the other two. Fast food has high calories but low of the other two. The equivalent calories of veggies to a big Mac would require far more food. The equivalent volume of veggies to a Big Mac would keep you filled up for longer.
A empty calorie is a colloquial term for food stuffs that have little content, in particular micros. Things like beer for example
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