But a small 2018 study found that taking higher dosage oral supplements (1,000 to 2,000 mcg) improves B12 levels about as effectively as injections
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This can put you in a tricky situation where your body may be getting enough in your diet, and yet it isnt absorbing it completely
hi I find it very easy to reach either arm but admit people do ask me that,I cant see why it would be a problem I just sit on end of bed with stuff all laid out on a clean towel and sharps bin handy,draw up b12 with a red filter needle,personal preference here,then discard and do the injecting with the orange needle , if the b12 is cold or you do have a bead of it on injecting needle then yes your right it can sting but again that is a rarity for me