From Potassium CitrateDietary SupplementNutricost® Quality GuaranteedVegetarian ProductGMP Compliant FacilityNon-GMO ProductThird Party TestedGluten-FreePotassium citrate is a powerful, easily absorbed compound made up of potassium and citric acid. An electrolyte, potassium citrate helps cells to ferry electrical charges between the muscles and brain, playing a key role in muscle contraction (including the heart!).