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B12 is also important for carbohydrate metabolism
Federal Register
Molecular formula: C78H123N23O23S2
When you inject into the arm (deltoid) your main goal will be to penetrate the muscle and then slowly deliver the vitamin B12 into the muscle, and then extract the needle at the same 90 degree angle that you inserted it
This can lead to more rapid and efficient management of deficiency symptoms unlike when you take an oral vitamin
This minimum requirement becomes the de facto standard
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