How can a product consist of ingredients that contain calories, but the product has zero calories itself?

Question

How can a product consist of ingredients that contain calories, but the product has zero calories itself?

In: 19

Answer 1

If the serving size of the product has less than 0.5 grams of fats, carbohydrates, or protein, the amount is rounded down to 0, resulting in 0 calories.

Many products take advantage of this loophole. For example, PAM oil spray, which is pure oil (fat), has a serving size of 0.25 grams, resulting in 0 calories per serving.