A medium banana offers about 422 milligrams of potassium or around nine percent of the 4,700 milligrams recommended daily intake. For the food most known for this nutrient, it is far from the most potent source. Many foods contain more potassium than bananas.
A single, medium baked potato has a remarkable 941 milligrams of potassium, which equals 20 percent of the daily recommended intake -- about double that of a banana. Potatoes also have gut-friendly resistant starch, especially when cooked then cooled, and a surprising amount of vitamins C and B6. Though potatoes get a bad rap health-wise, it's the butter and sour cream most people add that render this root vegetable unhealthy.
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