Again, knowing the healthiest cuts is key. Ounce for ounce, beef tenderloin has about the same calorie and fat content as skinless chicken thighs. Rich in protein and vitamin B12, this cut is a good source of selenium, zinc, iron, phosphorus, and B Vitamins. Versatile and flavorful, tenderloin is a smart indulgence that can be paired with myriad sauces and sides for a healthful meal. Get to know less expensive lean cuts such as top sirloin (great in stir-fries) and flank steak, a great all-purpose cut that's cheaper than tenderloin and works in many recipes.