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

Dietary calories measure how much stuff your body can absorb and burn. The minerals in mineral water are various kinds of salt and ash. They can be absorbed but they don’t burn.

So it really is zero.