Foods with the highest potassium content: 1, legumes, such as soybeans, green beans, red beans, broad beans, peas, these legumes are often rich in potassium. 2, vegetables, such as mushrooms, bamboo shoots, purple cabbage, leeks, celery, these vegetables are often very high in potassium. 3, the highest potassium content of fruits are often peaches, pears, apples, bananas, watermelon, these fruits are also often rich in potassium. Very rich in potassium, for the role of potassium supplementation is very obvious.