Pure Potassium gluconate, B.P. grade. Potassium gluconate is a preferred organic source for potassium, used to treat or prevent depletion of the potassium blood levels. A normal level of potassium in the blood is important as potassium helps the cells, kidneys, heart, muscles, and nerves work properly. Most people get enough potassium by eating a well-balanced diet. Some conditions that can lower the body's potassium level include severe prolonged diarrhea and vomiting, hormone problems such as hyperaldosteronism, or treatment with "water pills"/diuretics.