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Energy and Cardiovascular SupportMineral SupplementSupports Cardiovascular HealthAssists in Energy ProductionSupports Optimal Kidney FunctionScience-Backed Quality Since 1969Swanson Ultra Potassium Citrate delivers pure optimum-potency 99 mg potassium citrate capsules at a great value. Potassium citrate benefits the human body in several ways but is most widely taken because it supports cardiovascular health and energy production. For many people and for a variety of reasons potassium citrate pills are often the preferred supplemental form of this vital mineral.