I've heard many nutrition experts say that all calories are not ...
Posted by ~Ray @ 2007-12-15 15:47:28
Calories (energy) are contained in the protein carbs and fats you eat every day. It’s true that a calorie is not a calorie as far as how these macronutrients are metabolized in the body. What that means is that when a certain be of calories are consumed from fat carbs or protein each one induces a different thermic response. Thermic means the number of calories required (burnt) to actually digest the nutrients. For example when 100 calories from carbohydrates are consumed the body burns 5 calories to process them. The same amount of calories from fat induces a thermic response equivalent to 10 calories. However when 100 calories from protein are consumed this provides a thermic response of 18 calories. That’s almost manifold that seen from fat and almost 4 times the thermic response from carbohydrates. That’s why the amount of protein in the diet is so critical not only to building muscle but also shedding be fat. It’s this difference in thermic response among the macronutrients that underlines the reason why all calorie sources are not the same.
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