Hello, I have been on here reading and reading and reading!, I have found this to be the best place for anything B12 as I have just started on mythly b12. I will tell you a shortened version of what I have gone through. Started about 3 to 4 years ago, just small things like hormones unbalanced nothing too bad just annoying, Drs of no help, I am an active person into sports and keeping fit always have good muscle tone and strength but I noticed things were getting weaker just a bit, I put it down to being in my 40"s but as time went on things went downhill, more hormal probs digestion trouble, Found I am celiac,H Pylori pos, went through the hell treatment but still suspect I have it, changed my whole diet and that made a lot of improvement, but still struggled with anxiety and panic attacks, brain fog from hell which I don't normally have! I went through a natropath as Drs were of no help and did make improvement but never quite all the way. Last year I began to have fatigue more often also my gall bladder was failing and had that out Jan this year. The fatigue got worse about July/August to the point of not being able to get off the couch, muscle weakness/ soarness, and strength was declining, then tremors and twitching, joint pain especially in the hip, heart jumping all over the place,my tongue became incredibly painful, I was back at the Drs as I was at the end of my rope I was encapable of doing bugger all, they ran all the tests said all was normal, see you later, have a nice day! To say I was angry was an understatement! I asked for my results, (BTW they refused to do a B12 panel) I noticed that on my heamotology that things were either just in range or right at the high end, when I googled them B12 deficiency came up repeatidly so I research the heck out of it, wow what an eye opener, I had nothing to loose so bought some Sun Ray Methlyb12,(its hard to get in Australia) started on about the 10th of Oct at 1200mcg sublingual, wow what a transformation, in about 10 days the muscle tremors were nearly gone I had energy! I felt strength returning to my muscles, I had drive back, I wanted to get out and do things, where as before I couldn't ride my bike the length of our driveway I was riding to school with my son! Then I had a bad day, I was shaking, weak, naseaus, headache, palpatations, a quick search and I though it was low potassium as I craved bananas! I started on coconut water and high potass foods and felt good again until last week when everything has gone downhill had that similar weakness, shaking, sweating ect when I was out in the garden but it was much worse, I didn't think I would make it back to the house! I got some Now potassium glucarate but I am a bit scared to take too much, so I have been having 2 aday ,It took along time to get somewhat better but not back to where I was, I am back with anxiety, brain fog, and oh my brain is MIA, moods are not good either, Does anyone know what has gone wrong? I'm not Me/CFS either, as far as I know anyway, I just don't know why I was so good then crashed badly. I take mag, zinc Vit c, iron spirulina, kelp, digestive enzymes, any help would be much appreciated oh and I hope this makes sense as brain fog has taken over!1 J ust a quick edit my Potassium level was 4 on last test.