Food labels that list 0’s might mislead you into exceeding your limits. For example most cooking sprays list calories per serving at 0 because there is less than 1 calorie per serving. The suggested serving size is unrealistically low though at 1/2 second spritz. The problem is that most people use far more than this and those partial calories do add up. A 6 second spray is the typical amount actually used by the average consumer according to Shape magazine. That would give you 50 calories and 6 grams of fat per uses as opposed to the 0 per suggested serving listed for both. If you are using cooking spray in multiple dishes multiply that. Diet sodas and other 0 calorie foods have simular stats. Be careful to know your facts.