Eazy info on Metabolism
 

Every time we eat a meal our bodies produce some heat which is a natural consequence of consuming food. This is termed the thermic effect of food (TEF). Although different nutrients affect metabolism differently, assuming and average mixed meal of protein, carbs and fats, an average thermic effect would be 10%. That means 10% of the calories inherent in the meal are burned off when eating. Voila, the more you eat the more you burn right?

Not quite so fast. Assuming a day's intake of 2400 calories is split into three meals of 800 calories means 80 calories are burnt off after each meal (as 80 is 10% of 80). If you choose to split it up into six meals of 400 you burn off 40 calories per meal.

As anyone can see the end result is the same. While having more frequent meals leads to greater bumps in metabolism every time you eat, the larger bumps when eating a bigger meal compensate for this fact. Ultimately, 3 * 80 and 6 * 40 equals 240 calories per day burned off by both groups.