People often worry that bananas are too high in sugar. This at least partially has to do with the glycemic index (which isn’t as important as the glycemic load… which I explained here).
What most people don’t realize is that bananas have at least a small amount of almost every vitamin and mineral! Not to mention a healthy dose of some nutrients… A small banana (~6″ long) has 11% of your daily fiber needs, 15% of vitamin C, 19% of vitamin B6, 10% of potassium, and 14% of manganese. That sounds like a pretty healthy snack or meal component to me!