The FDA requires protein quantity, calculated in an FDA approved method, to be shown on the Nutritional Facts Panel of food items.  And the label must also indicate if the protein is of lower quality or adjust the displayed protein content to adjust for the lower quality.  Here, defendant’s products displayed the correct protein content as shown by an FDA-approved test.  The alleged fact that the “amount of digestible or usable protein the products actually deliver to the human body is even lower” than the actual amount of protein the products contain did not show any violation of the FDA regulations which preempt any stricter state law standard.