Although the price is several times that of ordinary mineral water, there are still many buyers. Some fashion magazines also introduce that soda water has the effects of detoxification, beauty, hangover relief and stomach protection. Experts said that the health care function of soda water should be treated rationally. On the whole, boiled water is the most cost-effective "health water". Professor Liu Wensheng, a surgical expert in Nanjing Hospital of Integrated Traditional Chinese and Western Medicine, said that soda water is an aqueous solution of sodium bicarbonate, that is, an aqueous solution of baking soda, which contains weak alkalinity. Medically, it can be used for external sterilization. Drinking it can balance the pH in the human body and change the acidic constitution. However, most of the sodas sold in the market are synthetic carbonated drinks, in which carbon dioxide is pressed into pure drinking water and sweeteners and spices are added. In foreign countries, some people have the habit of drinking soda water after exercise, which helps to eliminate fatigue. The principle is that when people are more active, muscles will produce a lot of lactic acid, which will make muscles "sore". At this time, drinking alkaline soda water can promote lactic acid and alkaline water to form inorganic salts, which are excreted with sweat and urine. But it is meaningless for ordinary people to drink soda water specially, because drinking boiled water can also play the role of beauty, detoxification and stomach protection. Ju Juan, director of the internal medicine department of the hospital, said that there have been cases of iron deficiency anemia caused by long-term eating soda biscuits, because long-term intake of excessive baking soda will aggravate the condition of patients with gastric ulcer, and it will also cause vitamin deficiency, affect the absorption of iron and cause iron deficiency anemia. Soda can neutralize stomach acid and relieve indigestion, but it can't cure diseases. Patients with gastritis with low gastric acid secretion should not drink a lot of soda water, because soda water can neutralize gastric acid, thus aggravating gastric acid deficiency. When gastric acid secretion is excessive, you can still drink some soda water in moderation. Professor Guo, a nutritionist at the Health Rehabilitation Branch of Nanjing Natural Medical Association, pointed out that from a nutritional point of view, any sugary drink or functional drink is not as good for health as boiled water. Pure boiled water is the easiest way to quench your thirst. It can be metabolized immediately after entering the human body, and has the functions of regulating body temperature, transporting nutrition and cleaning the body. After boiling naturally cooled cold water, it is easy to penetrate the cell membrane to promote metabolism, increase the hemoglobin content in blood, enhance the immune function of the body and improve the disease resistance of the human body. People who are used to drinking cold boiled water have high dehydrogenase activity in their bodies and less lactic acid accumulation in their muscles, so they are not easy to get tired. Yangpu Zhu Qun