Fruits rich in potassium include bananas, passion fruits, guavas, avocados, apricots, papayas and figs. Potassium levels can vary widely between different types of fruit. For example, a banana contains about 422 milligrams of potassium, whereas a passion fruit contains about 63 milligrams of potassium.
Other fruits rich in potassium include pomegranate, pummel, honeydew melon, oranges and nectarines. Potassium is also in vegetables, dairy products, fish and meat.
Potassium is a mineral that helps prevent heart problems, lowers high blood pressure, and maintains normal functioning of the muscles, brain and nerves. On the other hand, potassium deficiency or hypokalemia causes abnormal heart rhythm, muscle weakness, constipation and muscle cramps.
An adult requires about 4,700 milligrams of potassium per day to maintain good health. In addition to eating potassium-rich foods, another alternative for obtaining sufficient potassium intake is to take potassium supplements.
Some medications can raise the levels of potassium in the body, whereas others may lower these levels. For example, spironolactone, a drug that treats edema and high blood pressure, raises potassium levels, whereas some diuretics for heart disease can make the body lose potassium. Factors such as hormones and kidney function can also affect the levels of potassium in the body.