The carbohydrate content varies among plant-based proteins, so read food labels carefully. Lean meats and meat substitutes: Each serving from this list contains 0 grams carbohydrate, 7 grams protein, 0-3 grams fat and 45 calories. Beef: Select or Choice grades: ground round, roast (chuck, rib, rump), round, sirloin, steak (cubed, flank,