There are three reasons why the human body lacks potassium in summer, one is that the human body sweats a lot in summer, in addition to water and sodium in the sweat, but also contains a certain amount of potassium ions; the second is that in summer, people's appetite is reduced, the potassium ions from the food intake is reduced accordingly, which will result in insufficient intake of potassium; the third is that the weather is hot, the human body consumes more energy, and energy metabolism requires the participation of potassium. The key to preventing and treating low potassium is potassium supplementation. Clinically, 10% potassium chloride solution can be used orally, but the most safe and effective way is to eat more potassium-rich foods, especially more fruits and vegetables. Potassium-rich fruits include bananas, strawberries, oranges, grapes, grapefruit and watermelon, etc. Vegetables such as spinach, yam, beans, amaranth and scallions are also rich in potassium. Various fruit juices, especially orange juice, are also rich in potassium and are good for hydration and energy. Tea, as mentioned earlier, has been determined to contain 1.1% to 2.3% potassium, so tea is the best summer drink to beat the heat. What are the symptoms of potassium deficiency? Potassium concentration in human serum is only 3.5~5.5mmol ／L, but it is necessary for life activities. The main role of potassium in the human body is to maintain acid-base balance, participate in energy metabolism and maintain the normal function of neuromuscular. When the body is deficient in potassium, it will cause general weakness, fatigue, weakened heartbeat, dizziness, and severe potassium deficiency will also lead to respiratory muscle paralysis and death. In addition, low potassium will slow down gastrointestinal peristalsis, leading to intestinal paralysis, aggravate anorexia, nausea, vomiting, abdominal distension and other symptoms. Clinical medical data also proved that people with heatstroke have reduced blood potassium. (Health News)