The acidity and alkalinity of food is divided according to the acidity and alkalinity of the solution after the ash produced by food is completely burned in water. Acidic food refers to food whose solution is acidic after its ash is dissolved in water, and alkaline food refers to food whose solution is alkaline after its ash is dissolved in water. The imbalance of acid-base food intake is easy to make the blood pH value deviate from the normal range.

The body fluid buffer system in the human body can well offset this tendency and maintain the blood pH at 7.34-7.45. Normal body fluids maintain a relatively stable PH value and are neutral and weakly alkaline. In terms of pH value, the normal pH range is 7.35~7.45. Because the human body has a perfect regulation mechanism, it can maintain the state of acid-base balance.

PH value of food acid-base body fluids

Blood can always stabilize the pH value in the range of 7.35-7.45, depending on the buffer. Adjust the body fluid to a relatively stable state through various buffers. When food intake causes a slight change in pH value, the buffer solution quickly restores it to the normal range. Only in this environment can the body work normally.

The pH value of blood will be strictly limited to 7.35 ~ 7.45. Compared with this acid, it is acidosis, and compared with this alkali, it is alkalosis. Acidosis and alkalosis are serious diseases, which must be treated professionally. Normal people don't do this. It is often said that there are many people with so-called "acidic constitution", and their blood is already acidic. I'm afraid this situation can only be detected in people who are dying.

Refer to the above? Baidu Encyclopedia-Food pH