As good as bananas may be for energy, they have a couple of problems with them, eat too many at once and due to the high pottasium content it effects the old ticker, A girl at work I work with, ate a pound of them in one go and was then carted off to the hospital with a suspected heart attack.
The second problem does not effect you cycling as a rule, but bananas have tryptopan in them and this makes you sleepy. I only discovered this when I used to eat them on Night shift and would come over all tired. Now I avoid them on nights, but for a good nights sleep, a couple of bananas helps.
Anyway, what was the original question?...................