Most folks think red meat is the enemy to healthy living, but beef can be a great source of lean protein as well as iron, zinc, and B vitamins. But you do need to choose the right cut of meat. When at the meat counter, look for top sirloin, eye of round, or bottom round cuts since these pieces of beef generally contain less than three grams of saturated fat and are under 200 calories per three ounce serving. Pay attention to the grade of the beef as well. The label prime is not as lean as select or choice grades of beef. If you keep your portion to three ounces, studies have found that you won't raise your cholesterol levels. Once again, moderation is key to healthy living. I'd also opt for grass fed and finished beef if you can find it — it is higher in omega-3 fatty acids.