From Manufacturer's Label:People take Potassium to support and maintain healthy electrolyte balance, regulate fluid balance, and support the health of muscles and the nervous system.**Potassium is an essential mineral and electrolyte necessary to promote and maintain water balance and cardiovascular health.** Potassium is used by muscles, including the heart, for proper energy utilization. Potassium also helps your body to regulate sodium which, in turn, helps with proper blood pressure management.  Promotes water balance** Promotes proper energy utilization by muscles, including the heart** Contains 99mg of elemental potassium per caplet 250 gluten free and vegetarian caplets