How can a food have zero calories per serving?

Question

Trader Joe’s Green Dragon hot sauce has plenty of ingredients yet zero calories per serving. How is this possible? Is it because the serving size is so small at 1 tsp?

In: 4

Answer 1

On top of the serving size, there’s also the fact(?) that some foods take more energy (calories) to consume than they contain. Something like lettuce. It obviously has calories, but by the time you chew, swallow, and digest it, the **net** calories are basically zero. Not exactly a scientific source, but https://thesavvykitchen.com/zero-calorie-foods/