Potassium is a mineral that is important for many body functions. Food sources include fruits, cereals, beans, milk, and vegetables.
Potassium plays a role in the transmission of nerve signals, muscle contractions, fluid balance, and various chemical reactions.
Potassium is most commonly used for treating and preventing low potassium levels, treating high blood pressure, and preventing stroke. It's also used for prediabetes and many other conditions, but there's no good scientific evidence to support these other uses.