If you want to burn off the extra body fat in your belly, then consuming quality protein will help you achieve your goal. Not only are proteins essential for building muscles, they also support healthy metabolism. And, of all the macronutrients, protein is the least likely to be stored as fat. According to some studies, you should consume at least 80 grams of protein per day, and the best sources of protein are grass-fed beef, organic chicken, free-range eggs, and bone broth.