Eggs are packed with protein and are low in calorie. Eggs also have an amino acid called leucine. This can act as a catalyst in your body when it comes to fat loss.Leucine also helps your body maintain muscle mass. Assuming you don’t really workout often, having foods rich in leucine will allow you to keep the little muscle you do have.If you do like to workout, a lot of people focus on cardio activities when they want to lose fat. When you’re doing cardio, it’s difficult to gain muscle and it’s even easier to lose muscle. Leucine helps your body maintain the muscle you already have when you are simultaneously trying to lose fat.