Bet you didn’t think you’d see a hearty beef sandwich on Healthy Eats! Fact is, it belongs here. Lean red meat (i.e., sirloin, tenderloin), is a great source of protein, zinc, B vitamins and iron. Tell me more, you say? Protein not only keeps you satisfied for hours, it provides all the amino acids you need to build muscle and burn fat. Zinc helps build muscle, plus it strengthens your immune system and promotes a healthy brain. B vitamins do a lot: B-12 promotes a healthy nervous system, B-6 builds a strong immune system, niacin aids digestion and riboflavin maintains healthy skin and eyes. Lastly, iron helps transport oxygen all over the body, which keeps your energy levels up.