How can mineral water have 0 calories?

Question

I understand that obviously water does not have calories, but the water we drink is not pure and contain other nutrients and minerals on it.

How can it still be 0 calories with these nutrients added? Is it really 0 calories or is the caloric content just extremely low (therefore they round it down to 0)?

In: 0

Answer 1

Adding to others: three main things have calories: protein, fat, and carbohydrates. Alcohol does too but it sort of its own thing. Fiber is a carb but is insoluble so doesn’t have calories in a strict sense. Carbs and protein both have 4 calories per gram. Fat has 9. Alcohol has 7. In general if something isn’t one of those four, it doesn’t have calories because like others said it can’t be broken down for energy