Potassium is an electrolyte found naturally in the body that works with sodium and calcium to regulate the body's water balance and maintain normal heart rhythm. It is responsible for nerve impulse conduction and muscle contraction. Found in many colorful fruits and vegetables, as well as low-fat dairy and certain types of seafood, natural sources of potassium play an important role in controlling blood pressure because potassium blunts the effects of sodium. The recommended daily intake of potassium for an average adult is about 4,700 milligrams per day.

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