I think the acidity of bananas would counteract the positives of the potassium. Marie was right about the sodium bicarbonate. 1/4 tsp. of baking soda in a small glass of water. There's also an electrolyte formula called 40000 volts, as the major minerals are all alkaline.
I would be careful with potassium
supplements. They can be very dangerous. It's one of the few minerals you should only take a very small amt. of unless under the direction of a doctor. If someone were really low on potassium, taking a bunch of potassium at once can cause palpitations as well.
Lorraineg57: My son had RLS & OJ worked. I have had it myself occasionally, and in my case calcium helped. Maybe some calcium fortified OJ?