Just an anecdote, from my experience of water-only intermittent fasting for 5 days. First time I did it, from around day 3, I will start feeling dizzy, if I su

Just an anecdote, from my experience of water-only intermittent fasting for 5 days. First time I did it, from around day 3, I will start feeling dizzy, if I suddenly standup from either lying down or sitting in a relaxed posture. Later I read that it was caused because of low blood pressure due to no salt intake. The next time I did intermittent fasting, I took some salt with my water, and the dizziness problem was not there.