Top 10 foods highest in protein. #1 Turkey breast: 30 grams of protein in half a turkey breast #2 Fish: Tuna, Salmon or Halibut have 26 grams of protein per each 3oz filet #3 Non-fat Mozzarella cheese: In 1oz slice there is 9 grams of protein. #4 Pork loin: 1, 5oz chop has 33 grams... Read more »