1. Bananas help overcome depression due to high levels of tryptophan, which is converted into serotonin -- the happy-mood brain neurotransmitter. 2 Eat two bananas before a strenuous workout to pack an energy punch and sustain your blood sugar. 3 Protect against muscle cramps during workouts and nighttime leg cramps by eating a banana. 4 Counteract calcium loss during urination and build strong bones by supplementing with a banana. 5Improve your mood and reduce PMS symptoms by eating a banana, which regulates blood sugar and produces stress-relieving relaxation. 6 Bananas reduce swelling, protect against type II diabetes, aid weight loss, strengthen the nervous system, and help with the production of white blood cells, all due to high levels of vitamin B-6.