Good point, the use of the term exitotoxicity is potentially confusing. I should say "symptoms like that of" or "often described as" exitotoxicity, as I have no proof of their origin. For me, mb12 REDUCES these symptoms, to a point. There is also the issue of flavours in the adb12 causing issues rather than the adb12 itself. It looks very likely through my experiences with supplementation so far that I have a glutathione problem, either I'm not making enough or it's being used up by something faster than it can be replenished. Clearly there are many possible reasons for this that taking more mb12/folate than I currently am just can't fix. Mercury toxicity being one possibility.