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No human clinical trials exist
Vitamin B12 Injections: How They Work Vitamin B12 injections are typically administered through a shot, usually into the muscle, although they can also be given subcutaneously (under the skin)
Under no circumstances are these products approved or intended for human or veterinary consumption, direct clinical diagnostics, or therapeutic drug administration
The shot goes into the muscleusually your arm or thighand you might get it once a week or once a month, depending on what your doctor recommends
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