You may recall, in spring of 2013 the TTB moved to allow serving facts on alcohol product labels after nearly a decade of discussion. The agency defines a serving fact as the serving size, number of servings per container, and the number of grams of carbohydrates, protein, and fat per serving size. It may also include information about the alcohol content of the product as a percentage of alcohol by volume or the fluid ounces of pure ethyl alcohol per serving.