In the long-term life evolution, the human body has formed a relatively stable and slightly alkaline internal environment. Normal blood PH should be around 7.4 (7.35-7.45). This phenomenon of constant pH is called acid-base balance. But these people only account for about 10% of the total population. Modern people's eating habits lead to excessive intake of acidic food, and the acidity of human body is much higher than that of alkalinity. More people's body fluid PH is below 7.35, and their bodies are in a sub-health state between health and disease. Therefore, the application of weakly alkaline mineral water is beneficial to the internal acid-base balance of human body and has health care value.