MMS alone will kill certain pathogens and infections (ie. malaria), but it must be augmented by super hydration and alkaline nutrition in order to balance your entire body.
The effects of Arthritis I believe to come from the poisons from pathogens, and you cannot find a better anti-pathogenic than Miracle-Mineral-Supplement , but if you are eating or drinking things that feed pathogens then you are attacking them with one hand and supporting them with the other.
How much are you drinking per day? Is it alkaline water?
Would you be willing/able to do green drinks with a veggie/grass powder, or veggie smoothies in a blender?