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Once we confirm that vitamin B12 injections are right for you, we will schedule your treatment, and one of our medical staff members will inject a vitamin B12 shot into the muscle of your arm or another area of your body

This product is intended solely for laboratory and scientific research purposes

Maybe there is a reason that the shoulder area is exempt from such restrictions

Discussion The results of this study should help establish, taking quality of life into account, whether the oral administration of vitamin B12 is an effective alternative to its intramuscular administration

J Biol Chem 275:89828990

That is meaningful