Calories count AND the energy/calories it takes to digest:
The acceptable macronutrient distribution ranges (AMDR) set forth by the Institute of Medicine of the National Academies recommend that people get:
45–65% of their calories from carbs
20–35% of their calories from fats
10–35% of their calories from proteins
Here is where the rubber meets the road:
On average, a person uses about 10% of their daily energy expenditure digesting and absorbing food, but this percentage changes depending on the type of food you eat.
Protein takes the most energy to digest (20-30% of total calories in protein eaten go to digesting it).
[Find out more about us: