Air negative ion physiotherapy instrument can be used. Negative ions are very helpful to enhance human immunity. The higher the content of negative ions in the air, the better for the human body. Of course, it can't be all negative ions. Now it has been applied to sanitary napkins. When the content of negative ions exceeds 2000 per cubic centimeter, bacteria cannot survive, so it is a good thing.
For cancer, there is a theory called free radical theory, because I would advise patients to supplement strong antioxidants to fight cancer cells and prevent them from spreading. Among all the strong antioxidants, the order is: grape seed essence, spirulina, vitamin E C A.