Comment by nothacking

They can round any number under 5 kilocalories to 0, and a gram of sugar has 4 kcal. Same thing with most sweetener packets, which use sugar as a filler or else there would be less then a single grain of powder per pack. Ironically, there is another fairly common filler: erythritol, which has less calories then sugar, and doesn't contribute to blood sugar, but because of how it's produced it can't be labeled natural.