Foods containing potassium has proven to be of great help when it comes to fighting high blood pressure. Bananas so happen to have high levels of potassium which will help you in fighting high blood pressure. As an adult you should aim to have 4700 milligrams of potassium added to your body daily. Bananas are not the only source of potassium, you can also try out some avocados, and tomatoes. If you have diabetes you should consult your doctor on amount of potassium you should consume as too much of it can lead to health complications.