what if b12 injections don t work Are Shots Safe? Royal Palm Beach Medical Group What happens if you inject
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However, certain circumstances warrant medical review and potential investigation

If the vitamin B12 level is borderline, a confirmatory blood test can be ordered
When B12 levels are too low, the nerves can become damaged, leading to sensations like numbness, tingling, or a pins and needles feeling in the hands, feet, or legs

Its not to say, though, that any of those are actually medically proven to be true, said Dr
