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
It’s just rounded to zero. The sort of precision you’re thinking of, well, that way lies madness… Because nothing is ever zero. Nothing is ever exactly anything. There’s never 100 kcal in a soda either. Even if it is by some definition, by some other definition it might be 100.00004 kcal, and that’s not the same as 100.00000.
So whether it’s 0.000006 kcal or 0.0000001 kcal in a bottle of mineral water, well, for all intents and purposes, it’s zero.
It’ll indeed never be zero, because even a speck of dust could increase the calorie content by 0.00000001. And then it wouldn’t be zero anymore, even if it was before.
Generally, the minerals in question are void of any energy. We only ever metabolize carbon. Carbon is present in sugars, fats and proteins. Minerals are metal oxides, and contain no carbon.
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