@Jimbo39 ... stupidly long delayed response but you asked once in this thread why some people might not be absorbing the potassium from food... I'm sure other people on here are immensely more clued up on the subject but while confronted with various horrible reactions in the beginning of experimentation with Mb12 etc I followed @Mary's suggestion that the reaction was a form of refeeding syndrome. I searched for refeeding syndrome in vegans (I've been Vegan all my life) and found an academic paper (Sorry I cant link it, just typing on my phone) about a case where a Vegan with various illnesses wa taken to hospital and auffered refeeding syndrome with a massive drop in electrolytes like potassium. The doctors found that despite IV introductions of these electrolytes the girl was not absorbing them or returning to stable levels. Eventually they realised she was deficient in vitamin D, and after giving her that, she became able to absorb the electrolytes thy were giving her. Fredd talks about all the cofactors needed to start methylation, I can honestly say I ignored about half of them: I realise now theres a lot I don't understand about all this but its important to be taking these other essential cofactors like vitamin D3 and calcium and magnesium etc because once you add in the MB12 etc and methylation starts up it can exacerbate other deficiencies you might not have known you had. but like I said, very much a newbie talking! 
