Potassium is one of the important minerals for the body. Potassium-rich diet strengthens muscles. Tomatoes are rich in potassium which is beneficial for the body. Along with vitamins, black pepper also contains a large amount of potassium, which acts as an antioxidant and makes the body healthy. Corn is also a great source of potassium. It is beneficial for a heartbeat and regulates blood circulation. Potassium is found in high amounts in beans. One cup of beans contains 829 mg of potassium. Beans are also a good source of iron and protein. Peas are also rich in potassium. One cup of peas contains 91.5 mg of potassium.