How to choose a water purifier

In recent years, water pollution in China has become more and more serious, and various kinds of water purification equipment have emerged. In addition to purification and filtration, many products also claim to have health effects. How to choose a water purifier? Is there really a health effect?

Question one: water purifier can really filter water?

Expert response: The use of different materials filter, it is possible to achieve the purpose of removing impurities, harmful organics, etc., and improve the taste.

Zhao Feihong, head of the Health Protection Drinking Water Professional Committee of the Beijing Conservation and Health Association, said that most of the water purifiers use filters of different materials to remove some of the impurities in the water through physical or chemical means, thereby achieving the purpose of purifying the water and removing odors. It is generally believed that the less contaminants the better, but Zhao Feihong reminds that the concentration of metal cations such as calcium and magnesium should not be blindly pursued. They are not pollutants, and the formed scale does not affect health. On the contrary, harder water containing a certain amount of calcium and magnesium ions is very beneficial to increase bone density, especially for teenagers who are in the development period, and those who are engaged in high-intensity labor all year round are even less suitable for drinking too soft water.

Zhao Feihong reminded that the kidney development of infants aged 0 to 6 months is not yet complete. Consider using water purification equipment to reduce water hardness.

Which type of water purification equipment works well? Wu Zhigang, professor of Tongji Medical College of Huazhong University of Science and Technology, believes that ultrafiltration is not as good as reverse osmosis compared with the effect of water purification. In general, the water purification device installed directly on the faucet is slightly weaker than ultrafiltration.

Question 2: Weak alkaline water is more beneficial to health?

The expert responded: The national drinking water pH standard is based on pipeline transportation considerations and has nothing to do with health; there is no evidence that weak alkaline water, small water molecules, etc. are beneficial to the body.

Alkaline ecological water machines, weak alkaline energy water generators, and alkaline ionized water machines... These water purification equipments, whose names do not look the same, are invariably proclaiming such a concept: because the human body is a stable one. Weakly alkaline environment, so weak alkaline water is the most suitable for human health needs, it has a more obvious role in nutrition and health care.

Zhao Feihong believes that from the point of view of technical conditions, the use of some small devices can indeed achieve the purpose of preparing "alkaline water." However, there is currently no real evidence that the pH of water is related to health. Experts said that there is indeed a pH value in drinking water indicators in China. However, this is not a health indicator, but it is to prevent metal pipes from being corroded by low pH liquids.

The concept of small molecules of water, mostly dependent on the presence of alkaline water water machine, businesses claim that this form of water is more easily absorbed. Experts say that small molecules of water may indeed exist, such as the mineral water molecules are smaller, but there is currently no evidence that this water has a direct relationship with health, let alone treatment.

Many products quote the "World Health Organization (WHO) proposed six (or seven) standards for good quality drinking water." The "standard" states that good quality healthy water should have a weak alkaline pH.

However, the reporter found that the current general "WHO drinking water standards," the third edition of a total of five major testing indicators. The only reference to the pH value is Article 10 of the “Inorganic Part” in Chapter 5 of the fifth major item. The standard is the same as the current standard in China, which is 6.5~8.5. The reason is stated as follows: Low pH water is corrosive While the high-pH water may have a greasy and odor, it does not mention that “weak alkaline water is good for your health.