What is your B12 lev: el now? B vitamins can make things tingly. Are you taking any other B vitamins? You can test for those as well separately. For muscle fatigue to improve more, you need to have your Vitamin D3 levels checked as that will be a better indicator for you, as will iodine levels. See an integrative medicine doctor to tie it all together for you nicely, and monitor your progress too.
Answered 10/3/2014
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