Despite its important role, some people need foods low in potassium. Here, dietitians share low-potassium foods that are full of other health benefits; plus, who needs to be worried about high potassium. Bell peppersBell peppers are chock-full of beneficial vitamins and minerals, including vitamin C, vitamin A, and vitamin E, per the Cleveland Clinic. Who should opt for foods low in potassium? High-potassium foods to avoidIf you’re at risk for high potassium levels, Pelitera says it’s just as important to avoid foods that contain a lot of potassium as it is to fill your plate with low-potassium foods.