For potassium deficiency in the elderly, the cause and severity of the deficiency should first be clarified. If the deficiency is only caused by a single diet in daily life and the gastrointestinal tract has good absorption function, potassium can be supplemented through food. If the condition is serious, it is recommended to take oral medication such as potassium chloride tablets to supplement potassium under the guidance of a doctor. Potassium is a very important cation in the human body, its main role is to maintain acid-base balance, participate in energy metabolism, and maintain the normal function of nerves and muscles. Daily choosing to eat foods with high potassium content can replenish the potassium needed by the body, you can eat vegetables with high potassium content such as potatoes, enoki mushrooms, green leafy vegetables, etc. In addition, there are also various kinds of beans, chicken, eggs, bananas and so on, which are also rich in potassium. If the potassium deficiency is caused by disease or patients who do not eat for a long time after surgery, you can take potassium chloride tablets, potassium citrate granules and other medicines under the guidance of your doctor for supplementation. However, they should be taken under the guidance of a physician according to the condition of the disease and should not be taken privately.