Bananas are superchargers of immunity. Bananas can boost your pooch’s resistance to sickness. Bananas contain vitamin C, an antioxidant that helps your pooch heal and repair. Bananas are packed with potassium, they’re also good sources of vitamin B6 as well as manganese, biotin, and copper, all of which benefit your pooch’s overall health. Bananas are also rich in magnesium, which may help your pooch absorb other vitamins more efficiently and promote healthy bone growth.