Fruits & Vegetables High in PotassiumFruits and vegetables that contain mg or more potassium per reference amount (20% or more of the. Eating more of these potassium-rich foods can lower your risk of high blood pressure, stroke, and heart disease. Too much sodium, too little potassium. Surprise—sweet potatoes, not bananas, rank highest on the list of foods that are high in potassium. See also our list of low potassium foods for more ideas. Potassium from fruits, like the ones listed below, are considered safe and healthy. For those with.