The pH value of healthy oriental skin should be between 4.5 and 6.5. Only when the skin is in the normal pH range, that is, weak acidity, can the skin be in the best state of absorbing nutrients. At this time, the skin's ability to resist external erosion, elasticity, luster, moisture and so on are in the best state. It can be seen that pH value is inseparable from safety and beauty.
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In addition, in the normal metabolic process, the human body constantly produces acidic substances and alkaline substances, and also ingests acidic substances and alkaline substances from the daily diet. Acidic substances and alkaline substances are constantly changing in the human body, and this change must rely on the body's regulatory function to maintain a relative balance. This balance is acid-base balance, and the range of balance is PH 7.35-7.45.
This PH value is most suitable for cell metabolism and systemic survival. All physiological function changes and biochemical reactions of human body are carried out under the condition of stable PH value, such as cell protein synthesis, energy exchange, information processing, enzyme activity, etc., which all require a stable pH environment.
The results of laboratory experiments show that if the PH value of human blood is higher than 7.45 or lower than 7.35, human diseases will occur. The variation range of blood PH value is very small, and the difference of 0.0 1 may be close to death. The PH value of body fluids remaining in the body varies widely, such as duodenal juice, gastric juice, urine and feces.
When the PH value of human body fluid is lower than neutral 7, it will cause serious diseases, and when it drops to 6.9, it will become a vegetative state. If it is only 6.8-6.7, people will die. Of course, too high PH can also lead to alkalosis, so the human body needs acid-base balance to maintain the health of life.
Baidu encyclopedia -PH (skin health PH)
Human network-acid-base balance is very important to human body. How to adjust the acid-base balance in the body with diet