Some foods rich in potassium include winter squash and sweet potatoes. Bananas, white beans and tuna are also high in potassium.
Additional foods include lentils, white potatoes with the skin left on and pure orange juice. The average adult should get 4,700 milligrams of potassium each day as part of a balanced diet, as noted on WebMD. Potassium is best obtained by eating foods rich it in rather than taking potassium supplements. Some people with certain medical conditions or taking medications may need higher or lower amounts of potassium on a daily basis. This should be discussed with the patient's doctor.