Jim Humble's response contains a complete falsehood: "MMS is a natural chemical manufactured by the human immune system to help prevent diseases and to keep the body healthy."
Your body cannot manufacture sodium chlorite or chlorine dioxide. As a matter of fact, they cannot exist in nature at all. They are manufactured, synthetic chemicals, created from elemental chlorine, which itself also never exists in nature, it must be separated from sodium chloride by electrolysis.
I am so sorry for Mr. Nash and for the probably many other people who have been harmed by this so-called "natural" remedy. There is nothing natural about it.