"Acid-base constitution" is a fallacy.
In recent two years, a "new theory of health" has been popular in publications and on the Internet-the chief culprit of most diseases is "acidic constitution", which covers almost all common diseases at present, such as hypertension, diabetes, tumors and even depression, so "alkaline food" is advocated.
This remark was reprinted by some media and networks, affecting a considerable number of readers. However, the information obtained by Life Times reporters from authoritative sources of kidney disease, oncology and nutrition shows that this statement is purely pseudoscience and has no scientific basis.
Nephrologist: Food can't affect the pH of body fluids.
After hearing the above statement, Professor Chen, honorary chairman of the Nephrology Branch of the Chinese Medical Association and chief expert of the Nephrology Center of the China-Japan Friendship Hospital of the Ministry of Health, first said that there are no words such as "acidic constitution" and "alkaline constitution" in modern medicine. He explained that the pH value in normal people is stable between 7.35 and 7.45.
The reason why it is so stable is that the human body has three major regulatory systems, namely, internal buffer system regulation, lung regulation and kidney regulation.
In vivo buffer system, the most important is bicarbonate system. Simply put, its "working principle" is that there are many acids in the body, which are neutralized by alkaline substances; There is more alkali, and there are acidic substances to neutralize it. Lung regulation means that when the acidic substances in the body increase, people will speed up breathing and exhale more acidic carbon dioxide, and vice versa. Kidney is also important. It can absorb alkaline bicarbonate and excrete acidic products. Only when the above three regulatory systems have problems, such as uremia, diabetic ketosis, chronic obstructive pulmonary disease, etc., the acid-base balance in the human body will be disturbed and metabolic or respiratory acidosis will occur. Under normal circumstances, the pH in the human body will not be affected by food.