MMS is an oxidizing agent, in the same family as hydrogen peroxide and medical-grade ozone. It works by oxidizing the membranes of the pathogens, thus killing the organisms.
MMS and other oxidizing agents are powerless against b hominis and other select protozoa as some of these produce anti-oxidizing chemicals that render the oxidizers useless.
However there have been reports on expulsion of flukes and worms. So you just have to try it. What are you trying to treat? Any specifics?
You must read and follow the protocol carefully, this is a must.