You're not alone. There's a lot of conflicting data out there about beef. Red meat is a potent source of immune-boosting iron, zinc and filling protein. But research has also linked it to an increased risk of heart disease and cancer. So, what’s the bottom line? Should you include it in your diet and, if so, how much and what kind should you eat to reap its benefits? Hamburger or hanger steak? Six ounces or eight? Our Health Editor-at-Large, Madelyn Fernstrom, PhD, CNS, sifts through the latest research to give you the straight dish on red meat.