The health scam of "acid-base physique theory" has long been exposed, but many people still believe that drinking alkaline water for a long time is good for health. Based on this, many water companies in the market use the concept of alkaline water to promote their products. For example, the advertisement of a famous mineral water in Yunnan put forward that "drinking alkaline water can cure diseases", but it was publicly refuted by experts: it is not as good as boiled water.

In recent years, various kinds of "functional water" have emerged in an endless stream. Do they really have the so-called nutrition and health care function?

Can alkaline water cure diseases? Not as good as boiled water

The myth of alkaline water continues. Taking a well-known brand of mineral water and bottled water in Yunnan as an example, the advertising language and the packaging of water bottles are intentionally brushed aside, suggesting that alkaline water has a "therapeutic" effect on tumors, gout, osteoporosis, blood sugar and fatty liver.

Is alkaline water really good for health? Wang, a national senior food inspector and food safety science expert, said that the concept of "alkaline water" is just a gimmick for merchants to make publicity, so there is no need to be overly obsessed and admired.

According to Jian Xu, director of the Department of Rheumatology and Immunology, the First Affiliated Hospital of Kunming Medical University, drinking alkaline water is good for gout and other people, which is totally hype, and it is not as good as boiled water.

Yu Wen, deputy chief physician of the Physical Examination Department of Beijing anzhen hospital affiliated to Capital Medical University, said that the acidity and alkalinity of the human body has nothing to do with the acidity and alkalinity of drinking water, and the human body has a great self-regulation effect on the pH value, which is usually not changed because of the pH value in the diet. On the contrary, drinking alkaline water for a long time will increase the burden on the gastrointestinal tract, leading to gastrointestinal dysfunction and even indigestion. In addition, drinking alkaline water for a long time will also increase the burden of renal alkali excretion.

Burn it to 135 and let it cool, so that boiled water can be absorbed easily?

Now there is also a kind of "boiled water" on the market. Simply put, it is cooked when it is cold. For example, an aquatic product claims that "135 is cooked at ultra-high temperature, and the boiled water is easy to absorb", which sounds very advanced and healthy. Is that really the case? In this regard, Dr. Yun Orfila, majoring in biology and food engineering at Purdue University in the United States, made a detailed analysis.

Let's start with "135 ultra-high temperature sterilization". First of all, there is no need to burn the water to this temperature. Secondly, "ultra-high temperature sterilization" is not an advanced technology, but the most conventional processing technology in the food industry. For example, milk at room temperature completely kills bacteria through ultra-high temperature sterilization.

In addition, "boiled water is easy to absorb." Although there is no explanation in the advertisement, we can see the clue from other marketing articles: small molecular water is better absorbed. In fact, water molecules are molecules composed of one oxygen atom and two hydrogen atoms. No matter how it is processed, it is impossible to make a water molecule smaller. So, it's just a selling point, a gimmick.

Drink water to supplement oxygen? Lack of scientific basis

"Don't believe in the gimmick of' functional water' to supplement oxygen and treat diseases." Li Fuxing, president of Shandong Weihai International Institute of Healthy Water Science, said that functional water needs to be proved by rigorous scientific experiments, and similar conclusions can still be drawn after repeated scientific experiments before such products can be defined as having certain functions. At present, the research on functional water in the world is still in the stage. There are many water that claim to have certain functions, and there is no corresponding research report that can stand scrutiny, and so is China.

For example, oxygen-rich water introduced by some merchants claims that the dissolved oxygen content in the product is 6- 10 times that of ordinary drinking water, which can effectively supplement the oxygen needed by the human body. In fact, this statement lacks scientific basis. Even if there is enough oxygen in the water, when the bottle cap is opened, the oxygen in the water immediately communicates with the air and will be released. How can I replenish oxygen to the human body? Moreover, oxygen enters the human body through the respiratory tract, and there is not enough evidence to prove that the digestive tract can absorb oxygen.

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Li Zhenhua, an associate professor at the School of Environmental Science and Engineering, Tan Kah Kee College, Xiamen University, reminded that some "functional water" under the banner of various new technologies will undergo some operations such as partial electrolysis, strong oxidation and pH adjustment in order to highlight their so-called special effects, resulting in the "functional water" made from them deviating from the scope of drinking water safety indicators. If you drink it for a long time, it may cause damage to the oral cavity and gastrointestinal mucosa, and even seriously affect the normal metabolism of the human body.