So you want to speed up your metabolism? Most people dream about it. The good news is there is a simple way to do 
so. It requires eating food. Yes, eating! Allow me to explain.
Practically everywhere, including some nutrition textbooks, state that all calories are created equal. One calorie of fat burned equals One calorie of protein burned. That makes sense. Doesn’t it? Not so fast!
A recent study published in the Scandinavian Journal of Clinical and Laboratory Investigation studied two groups of people to determine the impact of over-feeding individuals - one group candy, and the other peanuts. Both groups were given the same exact number of calories. However, group one was given candy, and group two peanuts.
The result of the study after two weeks showed an increase in insulin levels, body weight, and waist circumference in the candy group only.
Surprise! Not all calories are created equal! So why didn’t the peanut eating group gain the same belly circumference as the candy group even though the calories were exactly the same? Simple! A high glycemic calorie such as candy has a different effect on the body versus a peanut calorie.