According to the book Environmental Health and Negative Oxygen Ions written by Professor Lin Jinming, a doctoral supervisor in Tsinghua University and an expert in Chinese Academy of Sciences, it is defined as follows: According to their mobility, positive and negative ions in the air can be divided into large, medium and small ions. Small ions have ion mobility greater than 0.4 ㎡/(v s), large ions have ion mobility less than 0.04 ㎡/(v s), and medium plasma is in between. Charged atomic groups or molecular groups close to molecular size belong to small air ions. These small air ions move fast, collide with each other in the atmosphere, and constantly gather to form large ions or middle ions. Only small ions or small ion groups can enter the body. Medical research shows that it is small particle size negative ions that have medical and health care effects on human body. Because only negative ions with small particle size can easily penetrate the blood-brain barrier of human body and exert their biological effects. Negative ions have excellent purification and dust removal functions, reduce the harm of second-hand smoke, and have a very important impact on people's life activities, mainly in improving human immunity, improving self-healing ability, improving insomnia, calming the nerves, treating respiratory diseases such as asthma, regulating blood pressure and blood sugar, restoring alkaline constitution, scavenging free radicals, resisting oxidation and aging, and preventing cancer.
Compared with traditional therapy, negative ion therapy is a broad-spectrum, efficient and superior natural therapy. Its advantages are as follows: 1, it can treat different diseases and multiple diseases at the same time, and there is no adverse reaction of drug treatment, which is especially suitable for the frail elderly. 2. It can be used in combination with any drug, which not only has no antagonistic effect, but also can reduce or eliminate the toxic and side effects of the drug, improve the body's tolerance to the drug, and better play the therapeutic role of the drug. 3. In the negative ion therapy, it only increases the natural factors that people have been inhaling since birth, so it is non-toxic and harmless, and has no side effects. 4. It is also a kind of leisure therapy, which can be used for work, study, watching TV and even sleeping. Easy to persist, lasting effect.