Protein is an important part of an endomorph’s diet for two reasons: First, protein is the most satiating of the macronutrients, so it will help fill you up at each meal and prevent food cravings and snacking between meals to limit calorie intake. Second, protein will support an intense training regimen, which is an important component of weight loss for an endomorph. However, many protein sources can be high in fat, so endomorphs should choose lean protein sources. Endomorphs are recommended to stick to fish and poultry. Your other choices include beans, tofu, lean beef and egg whites.