Natural Factors Potassium Citrate - 99 mg - Important for good overall cardiovascular health, and the promotion of a regular heartbeat and lowering of blood pressure, Potassium also works with Sodium to control the body's water balance. Natural Factors Potassium Citrate 99 mg is a mineral supplement for the maintenance of good health. The chelated form of potassium (citrate) allows the mineral to be more readily absorbed and metabolized by the body, making it an ideal choice for those with low stomach acid or other digestive issues.