Foods with a high concentration of potassium include: potatoes, bananas, lentils, beets and pumpkin. A medium size banana offers about 425 milligrams of potassium, while one cup of cooked beet greens offers approximately 1300 milligrams of potassium. Foods rich in potassium contain over 200 milligrams.
Potassium is a mineral that helps to regulate blood pressure, control nerve functions, and contract muscles. Potassium naturally occurs in fruits, vegetables, dairy and protein sources such as meat and nuts. The level of potassium needed varies depending upon overall health and the presence of any medical conditions. The consumption of certain medications, such as diuretics, alter the body's ability to effectively utilize potassium.