and proteins? For example a 12fl oz.can of Keystone light has 5 grams of carbs 0 grams of fats and .7 grams of protein. Technically ( according to the fact that there are 4 calories for every gram of protein 4 calories for every gram of carbs and 9 calories for every gram of fat) there should only be 22.8 calories in a can, but it says that there are 100 calories in every can. And its there are like four servings in a 12 ounce can of beer, the nutrition facts on the can even say per 12 fl oz..