Probably there is some minimum, because when you drink just regular water that has some calories as well. And not drinking for a day might be he worst dietary idea ever.
UPDATE: Water doesn't contain calories. Sorry for the misinformation.
My mouth (actually my hands) was faster then my brain. :-)
UPDATE: Water doesn't contain calories. Sorry for the misinformation.
My mouth (actually my hands) was faster then my brain. :-)