Gnc Potassium & Magnesium Aspartate 250 Mg - 120 Capsules Helps Regulate Water Balance. Necessary For Normal Muscle Cell Contraction. 250 Mg Per Serving 120 Capsules 120-Day Supply Gnc Potassium & Magnesium Aspartate 250 Mg - 120 Capsules Helps Regulate Water Balance. Necessary For Normal Muscle Cell Contraction. 250 Mg Per Serving 120 Capsules 120-Day Supply These Statements Have Not Been Evaluated By The Food & Drug Administration. This Product Is Not Intended To Diagnose, Treat, Cure, Or Prevent Any Disease