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Been having symptoms for a while now , muscle aches , random pains in arms or legs , pins and needles, muscle fasculation , cramp and extreme tiredness. Gp seems disinterested. So I got myself an active b12 test done , results say normal range but I am in the low end of normal 37 - 171 is classed normal and I am 56. I have heard a lot of people say that the threshold is too low ... anyone else have this but still have symptoms?
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