Lean ground beef
 

A 3 oz. serving of 95% lean ground beef comes in at just 164 calories and 4.5 grams of fat, and boasts muscle-building creatine and iron, which helps keep your energy high and muscles working properly. You want at least 90% lean beef because it’s lower in calories and fat, and if you really want optimal quality, go for grass-fed beef; it’s more nutrient-dense.*