Potassium is essential for proper functioning of the heart muscle, insulin release, proper fluid balance, and nerve function.  Today, Potassium deficiency is not uncommon because high salt intake, eating refined foods, taking diuretics and drinking large quantities of water flush out vital Potassium from the body.  Each tablet supplies 500 mg. of Potassium Gluconate (elemental Potassium - 83.5 mg.).