This mineral helps keep your heart beating regularly, and one study found that taking it lowered systolic blood pressure (the top number). Reducing blood pressure lowers the risk of stroke, heart disease, heart failure, and kidney disease.
Teens and adults should get 4,700 milligrams of potassium a day. Many foods have this nutrient, so it's rare that people don't get enough from their diet. Potassium-rich foods include many fruits and vegetables, milk, meat, and whole grains.