You don't need to completely ban red meat from your diet in order to stay fit. You just need to choose the right cuts. Lean cuts of beef have less saturated fat than a typical cut, and contain healthy amounts of protein, iron, zinc and vitamins. Flank steaks are both lean and economically priced.
Leaner cuts of beef cost less than richer, fattier cuts. However, there is a tradeoff. Leaner cuts have less flavor, with a tougher texture. The good news is, though, you don't have to suffer through tasteless, chewy beef. The correct cooking technique will render any lean flank steak delicious. Chefs recommend marinating the meat overnight before grilling or broiling. An acidic marinade -- something with vinegar or orange juice -- will actually break down some of that tough connective tissue. Your lean steak will end up as tasty as a more expensive filet.