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The hypersensitivity is thought to be mediated by immunoglobulin E (IgE) or sensitization to the vitamin B12 molecule itself
If you need to recover quickly from an illness that depleted your B12 reserves or have recently discovered you have a B12 deficiency that is impacting your quality of life, one solution is to give your body a larger dose of B12 all at once
Self-Injection Self-administer vitamin injections at home
The shoulder Experienced doctors commonly administer B12 injections into the upper arm area by inserting the injection into the deltoid (shoulder) muscle
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