There is no fastest way to replenish potassium. If you want to replenish potassium, you can do it through food or medicine. 1. Food supplementation: Fruits such as bananas, oranges, cherries and jujubes can be consumed as potassium supplements, as well as meat, vegetables, beans and other foods with high potassium content. 2. Drug supplementation: When the body is seriously deficient in potassium and there is no obvious effect of food supplementation, it is necessary to follow the doctor’s instruction to take drug supplementation, such as potassium chloride delayed-release tablets, potassium citrate granules, etc. If necessary, it can also be taken by intravenous infusion. If necessary, potassium can also be supplemented by intravenous infusion of potassium-containing solutions. Potassium supplementation needs to start slowly from low concentration, it is not suitable when urine is low, and the condition should be closely observed in the process of potassium supplementation to prevent hyperkalemia from occurring. If symptoms such as limb weakness, fatigue, dyspnea and other discomforts occur, suggesting possible hypokalemia, please consult a doctor as soon as possible and have it treated by a professional doctor.