This product, MMS, touted as a cure of everything from AIDS to cancer, is dangerous. (The product warning can be found here.) It equates to eating bleach. Relates to the idea that alkalinity is the key to killing cancer. Which is odd because I've read abstracts showing how alkalinity definitely helps some cancers survive. But there is no point looking at scientifically derived information because as Deepak Chopra would say, "that is based on Newtonian Mechanics, we're into Quantum Healing now". High school chemistry is sufficient, you don't have to be Quantumy to deal with this.
If your pH ranges are skewing there is something wrong with your diet. If you have to keep taking something to restore your pH values then you are potentially masking a serious illness. It may even be the case that your body is shifting the pH towards more acidic or alkaline for a specific reason. pH values may well vary throughout the day. For example, one study on retina found pH values ranging from 7.0 - 7.8. This circadian dependent shifting of pH values is entirely consistent with circadian dynamics in general. Life abhors stillness, our bodies and cells are typically in constant flux. It is as if it is easier to maintain a dynamic system that it is cycling through various phases rather than static. Perhaps not so surprising when you have feedback loops that directly impinge on other feedback loops. In that scenario perhaps it is impossible to obtain a "steady state". On the other hand, do "steady states" ever exist? Now if you'll excuse me, Bodhidharma is seeking my advice regarding a severed finger ... .