Potassium is an essential mineral and electrolyte necessary for proper cell function. It is the third most abundant mineral in the body, and is required for the heart, kidneys, and brain to function properly. Potassium helps maintain a normal heart beat as well as normal functioning of nerves and muscles. It is also necessary for the body to break down and use carbohydrates.

Sodium, which transports nutrients to the cells, works with potassium, which removes waste from the cells. Potassium helps with excess sodium excretion, which helps relax blood vessels. High sodium can cause potassium levels to drop, which can lead to heart attack and stroke. Low magnesium can contribute to low potassium as well.