Bananas have sugar in the form of fructose. They also contain potassium, which is one of the nutrients you lose the most of when you drink. Bananas are also a natural antacid which can help out with nausea. They are high in magnesium which can help relax those pounding blood vessels causing that hangover headache. Try a peanut butter, honey and banana sandwich on white bread. Or make a shake with one banana, honey, milk and a ground up Aspirin. The latter is the best and seems to work every time for me.