Yeah, I know: grass-fed beef is a little pricey. But its higher ratio of good-for-you fats make it well worth the cost: A study in Nutrition Journal found that grass-fed meat contains higher levels of omega-3 fatty acids, which are known to reduce the risk of heart disease. And when it comes to your waistline, grass-fed beef is naturally leaner and has fewer calories than conventional meat. Consider this: A 7-ounce conventional strip steak, trimmed of fat, will run you 386 calories and 16 grams of fat. But a 7-ounce grass-fed strip steak is only 234 calories and five grams of fat—you’ll save more than 150 calories and your steak will taste better.