Did you know that the process of digesting food burns calories? Protein burns the most calories of the three macronutrients (carbohydrates, protein, and fat). According to research, boosting protein consumption temporarily increases metabolism by 15 to 30 percent. A protein-rich diet, on the other hand, promotes healthy amounts of lean muscle mass, which raises the basal metabolic rate. Lean meats like chicken and fish, as well as dairy, whole grains, beans, lentils, and nuts, are also good sources, according to Cederquist. Spread protein consumption throughout the day for the best results.