No idea Kate50, all I know is that if I go more than 24 hours without a banana, the twitching and jumping comes back and drives me crazy. I would have thought if the banana was just making me feel less stressed, then I should sleep well shortly after eating one, but it doesn't seem to have any effect on that - so I could miss eating my banana tomorrow, sleep well tomorrow night and be driven mad the next day by the jumps. I've gone through phases of giving up bananas as I don't like eating them, but every time the jumping drives me crazy and I have to start eating them again.