Of course, red meat should only be eaten in moderation, but when you do eat beef, swap grass-fed beef for corn-fed beef. Grass-fed beef is lower in calories, hormones and antibiotics than regular beef. The ratio of “bad” omega-6 fats to “good” omega-3 fats far more favorable in grass-fed beef than in corn-fed beef. Omega-6 fats are harmful, as they are thought to trigger inflammation, and increase the risk of heart disease and cancer. But wait, that’s not all! In terms of belly fat, grass-fed beef wins out too. Grass-fed beef is richer in conjugated linoleic acid (CLA), which may decrease abdominal fat and increase muscle mass.