Bananas: Perhaps the most well-known source, a medium banana has about 400 mg of potassium. They are convenient and perfect for a quick snack. Sweet Potatoes: One medium sweet potato contains ...

Bananas are a well-known source of potassium, but other foods are better sources of potassium. A medium banana (115 grams) contains 375 milligrams of potassium, providing about 11-14% of the Daily ...