Yeah, true...also low potassium could also result in sudden cardiac arrest. Magnesium and potassium are electrolytes. This is the means in which the body conducts electricity throughout vital organs and other cellular activities. I think that he was low in everything including food. Plus, with lupus and, the need for a lung transplant and chronic pain, in reality he was dying regardless of the root cause. Too bad he didn't hang around this site, he would have lived a little longer.