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What Does Potassium Do?

Potassium is a mineral that helps the kidneys function normally. It is also an electrolyte, a substance that conducts electricity in the body, along with sodium, chloride, calcium, and magnesium. Potassium is crucial to heart function and plays a key role in skeletal and smooth muscle contraction, making it important for normal digestive and muscular function, too.

People who get a lot of potassium in their diet have a lower risk of stroke. However, potassium supplements don't seem to have the same benefit.

A heart-healthy diet includes potassium from fruits, vegetables, and legumes. Good sources of potassium include bananas, citrus juices (such as orange juice), avocados, cantaloupes, tomatoes, potatoes, lima beans, flounder, salmon, cod, chicken, and other meats.

Potassium: Benefits, Food Sources, RDA, and Deficiency
Potassium: The Importance of Potassium

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