It usually has very few to no calories and no significant nutrition. For example, one 12-ounce (354-ml) can of Diet Coke contains no calories, sugar, fat or protein and 40 mg of sodium (1)
A 12-ounce can of Diet Coke contains 125 mg of aspartame, 113 mg of which is the "protein" aspartylphenylalanine (5). So, that can contains 0.452 calories. This is a very small number, but it is not zero. So, 2 cans of Diet Coke contains 0.904 Calories.
