It's how fast those calories get into bloodstream as a glucose.
"Fast" carbohydrates are extremally efficient in this regard; you can eat a ton before hunger leaves you. And this is a big gotcha as we constantly overeat being fooled by our mind and carbohydrates with high glycemic index.
So, it is not just calories: it's the amount and speed of insulin response to those calories.
It's how fast those calories get into bloodstream as a glucose.
"Fast" carbohydrates are extremally efficient in this regard; you can eat a ton before hunger leaves you. And this is a big gotcha as we constantly overeat being fooled by our mind and carbohydrates with high glycemic index.
So, it is not just calories: it's the amount and speed of insulin response to those calories.