In recent two years, a "new theory of health" has been popular in publications and on the Internet-the culprit of most diseases is "acidic constitution", which
These diseases cover almost all common diseases at present, such as hypertension, diabetes, tumor and even depression, so it is recommended to eat "alkaline food"
Things. "
This remark was reprinted by some media and networks, affecting a considerable number of readers. But the reporter of Life Times learned from kidney disease, oncology,
The information obtained from authoritative sources in the field of 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, honorary chairman of Nephrology Branch of Chinese Medical Association and chief expert of Nephrology Center of China-Japan Friendship Hospital of Ministry of Health.
Professor Chen first said that there is no distinction between "acidic constitution" and "alkaline constitution" in modern medicine. He explained that normal people
The pH value in the body 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.
Among the in-vivo buffer systems, the most important one is the bicarbonate system, and its "working principle" is simply summarized as too much acid in the body.
Neutralizing with alkaline substances; There is more alkali, and there are acidic substances to neutralize it. Lung regulation means that when the acid substance in the body increases, people will supplement it.
Breathe quickly and exhale more acidic carbon dioxide, and vice versa. Kidney is also important, it can absorb basic bicarbonate.
And secretes acidic substances. Only when the above three regulatory systems have problems, such as uremia, diabetic ketosis, chronic obstructive pulmonary disease and so on.
Under normal circumstances, the acid-base balance in the human body will be disturbed, resulting in metabolic or respiratory acidosis, while the pH in the human body is normal.
Will not be affected by food.
A book promoting "acid in the body is the source of all diseases" says: "When the pH value of the human body is between 7 and 7.35, it belongs to weak acid constitution and is vulnerable to attack.
Minor illness interferes. Professor Chen said: "When the blood pH reaches 7.2, it is severe acidosis, which has reached the limit of life." book
He also said: "When the pH value is 6.9-7, people are prone to major diseases such as cancer ..." Professor Chen Yiping has no heart. "I am clinical.
I've never seen a living person with a pH below 7, let alone live slowly and get cancer. "
The reason why "body acid" is highlighted may be related to the more common clinical acidosis diseases. Professor Chen said to him:
There are four kinds of acid-base balance disorders in human body: metabolic acidosis, respiratory acidosis, metabolic alkalosis and respiratory alkalosis. Their first two
It is more common, but it must not be said that people will be "sour" when they are sick. Moreover, for the treatment of acidosis, we should first start with "curing the root cause"
-It is caused by uremia and needs dialysis; Diabetes is caused by insulin; If it is caused by chronic obstructive pulmonary disease, it needs to be improved.
Lung function ... only when the condition is serious, you need to inject alkaline drugs intravenously, and it is impossible to solve it by eating "alkaline food".
The above book is entitled "Finding the Right Pathogen and Reviving Alkali", with 100 pH test paper attached. Readers are advised to "judge the body by measuring the pH value of urine.
Internal pH ". Professor Chen pointed out that there is no scientific basis for this. Human urine itself is acidic, and the pH of urine cannot be reflected at all.
The pH in the body. The pH of urine is related to diet. When eating meat, eggs, milk and other high-protein substances, urine will be slightly acidic. Eat more fruits and vegetables.
Urine will be relatively alkaline. In fact, adjusting the pH of urine through diet can only prevent some salts from crystallizing or depositing in the urinary system.
Calculous diseases, such as preventing urate crystals from depositing in the kidney or forming urinary calculi, should make urine alkaline; In ord to prevent that formation of urinary calcium oxalate stones,
You should make the urine sour.
At the beginning of the book, it says: "The United Nations Health Organization has published a set of data-70%-80% of people in the world belong to unhealthy acid bodies.
Quality, more than 90% people died of high-risk diseases caused by physical acidification. "The reporter asked a number of experts at the professor level, and everyone commented on these figures.
I have never heard of it, and I have never heard of the organization "United Nations Health Organization".
According to Ms. Liu, the editor of the book, the book "sells well" in the market. The reporter tried to contact the author of the book, but was rejected.
Ms. Liu said that the author is a doctor in a Chinese medicine hospital in Chengdu. But she doesn't know the author's real name or the specific work unit.
I haven't met them, and their contact is through others. And Ms. Liu has always stressed that "this is normal". According to the reporter's understanding, publishing
Book companies don't have medical editors, but they publish many medical and health books.
Nutritionist: Acidic and alkaline foods are bullshit.
According to the theory of acid-base constitution, people must eat "alkaline food" to be healthy. In this regard, the reporter interviewed the vice president of China Nutrition Society.
Cheng Yiyong, Chairman and Deputy Editor of Dietary Guidelines for China Residents 2007. Cheng Yiyong said that as early as the 1940s, there was research on food chemistry.
Some scholars dissolve the residue left by food burning in water, and then measure the pH value to analyze the mineral composition in food. But food chemistry research
It is very different from the complex metabolism of food after it enters the human body. Cheng Yiyong pointed out that some so-called popular science articles advocate that "you should pay attention to choosing food."
Acid-base balance "lacks scientific basis and is not worth advocating at all."
However, the term "acid and alkaline food" has caused great confusion among the people, and many people have consulted experts from the Nutrition Society. In this regard, China nutrition.
Especially in the 2007 Dietary Guide for China Residents, it was clearly stated: "According to the theory of food acid-base balance, cereals, meat, fish and eggs.
Excessive intake will lead to acidic constitution and lead to chronic diseases such as hypertension, hyperlipidemia, diabetes and tumor; Vegetables and fruits are alkaline foods.
It can correct acidic constitution and prevent and treat chronic diseases. In fact, vegetables and fruits can prevent the above-mentioned chronic diseases because of their production.
Low energy and rich in vitamins, minerals, dietary fiber, etc. , not the role of alkalinity. "
Cheng Yiyong emphasized, "We searched over 50 years 1000 papers about the acid-base balance of human body, and found no food acid.
Research report on acidity composition caused by alkalinity. To be responsible, the division of food acidity and alkalinity is the research category of food chemistry, which is the same as food entering the human body.
The metabolic changes in the future are completely different. "
Oncologist: The cause of tumor has nothing to do with acid and alkali.
"Acid constitution leads to tumor" is a very striking point in the theory of acid-base constitution. The reporter interviewed an academician of China Academy of Engineering.
Professor Sun Yan from Cancer Hospital of China Academy of Medical Sciences. He believes that "acidic constitution causes cancer" is simply "not worth mentioning". Academician Sun Yan pointed out that people
Why do you get tumors is studied through biological experiments, that is, long-term teratogenesis, carcinogenesis and gene mutation of animals and cells in vitro.
Test whether a certain factor will cause normal cells to turn into cancer cells.
Sun Yan said that after the above research, there are currently five recognized carcinogenic factors: one is chemical factors such as polycyclic aromatic hydrocarbons and aromatic amines.
Most of them are related to environmental pollution and occupational factors, which may induce leukemia, lung cancer and bladder cancer. Second, ionizing radiation, thermal radiation, chronic
Physical carcinogenic factors such as inflammatory stimulation have a direct impact on the incidence of leukemia and osteosarcoma; Third, viruses such as Helicobacter pylori can induce
Gastric cancer and human papillomavirus are the main causes of cervical cancer, and hepatitis B virus can induce liver cancer. Fourth, genetic factors, such as breast cancer and large intestine.
Cancer has an obvious family history; Fifth, lack of immune function.
"Of course, some changes have taken place over the years," Sun Yan said. "With the change of lifestyle, nutritional imbalance, environmental pollution and internal division.
Unbalanced secretion, obesity and excessive mental stress may all be the causes of cancer. "
However, Sun Yan said that even with the above conditions, people will not get cancer at once, but need the long-term effects of internal and external factors.
This process. From this perspective, the so-called "carcinogenic theory of acidic constitution" is also completely untenable.
Is it popular science or marketing?
In fact, many articles claiming "the theory of acid-base constitution" are paving the way for popularizing some so-called "alkaline products".
The reporter noticed that a year ago, the articles on "acid-base constitution" on the Internet mostly showed people in the face of "popular science". Now, almost all of them are
Behind such articles, products are hidden or presented, which makes people wonder whether this is a marketing tool.
On the website of a health care product manufacturer in Xinjiang, there are a large number of "popular science articles" about "acid and alkali constitution", claiming various cancers.
Are all related to "acidic constitution". And the product they provide-"tea horse ancient alkaline food" has the function of "expelling acidic substances from human body,
Correct the pH value of the human body ",and it is expensive. A small bottle 10 ml of essential oil costs 358 yuan, and a bottle of 90 capsules is sold in 280 yuan.
In addition, new products such as "weak alkaline water cup", "alkaline ionized water" and "natural green algae" are also attached to the "acid-base constitution theory"
"hitchhiking"
However, the above remarks were reprinted by the internet and the media, which had a great influence and reminded people of the chicken blood and black tea fungus that were all the rage in the last century.
Even the recently refuted "detox meal". In this regard, Cheng Yiyong said that the target of popular science propaganda is ordinary people, so the content must be
Fully proven scientific knowledge. "Some so-called' scientific discoveries' and' scientific and technological achievements' do not have enough experimental basis, but are simple.
Inference or speculation, if spread at will, will mislead the masses. In academia, experts are allowed to argue about different views, but generally speaking,
The masses lack sufficient discrimination against popular science articles full of jargon and are easily deceived, which requires professional scientific and technological workers to stand up and clarify.
. "
Professor Chen believes that it is necessary to severely expose these pseudo-sciences that are fabricated and enriched by cheat people, so as to make them become street rats and let them develop.
Restore the original appearance scientifically.
Network Editor: Source: People's Daily-Life Times Release Date: September 9, 2008