With fasting you generally want to take to take some salt. Any time you feel dizzy or nauseous that's basically an indicator that you're lacking some electrolytes. I usually take a bit of table salt or sea salt on the edge of a spoon and then wash it down with water.
Warning: Don't take too much salt all at once, because that can trigger a regurgitation..
Warning: Don't take too much salt all at once, because that can trigger a regurgitation..