Foods that are high in complex carbohydrates and proteins increase metabolism. There is a simple reason for this. Complex carbohydrates and proteins need more energy to break down. As a result, the body burns more calories while digesting such food. The release of energy is also distributed evenly and over a long period making us feel fuller for a long time. On the other hands fats and sugar cause short bursts of energy, followed by periods of low energy during the urge to binge strikes again.

Fruits and vegetables contain complex carbohydrates. These are also high in fiber. They fall into what is called the “negative calorie” category of foods. Foods that take more calories to digest than it contains are called “negative calorie” foods.
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