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The thigh, buttocks, or upper arm are the best spots due to their muscle depth and ease of access
See the image for the exact spot The name for injections in this area are called intramuscular because the needle must penetrate the muscle to deliver your vitamin B-12 so that it is quickly delivered where your body needs it
The table shows cyanocobalamin is effective and affordable, but hydroxocobalamin lasts longer
Usually, B12 is absorbed in the stomach with the help of an intrinsic factor protein
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