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Nervous System and Cardiovascular Health99 mg Per CapsuleMineral SupplementSupports Cardiovascular HealthAssists in Energy ProductionSupports Nervous System FunctionScience-Backed Quality Since 1969Swanson Potassium is a unique formula that promotes heart health. This vital electrolyte mineral is also used by other muscles of the body and is essential for proper energy utilization. Each capsule delivers 99 mg of elemental potassium. Feed your heart and muscles every day with potassium!