Potassium is an essential mineral that is widely distributed among food sources with especially high levels present in fruits and vegetables. Potassium is critical for the maintenance of normal whole-body and cellular fluid levels as well as for the maintenance of acid-base balance. It is also necessary for proper muscle contraction the maintenance of healthy heart function and for the transmission of nerve impulses.Potassium Citrate is a well absorbed and highly bioavailable form of potassium.