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When detected, a B12 deficiency is usually treated with vitamin B12 injections or B12 supplements
B12 can be injected just under the skin (often in the abdomen) or into the muscle (usually the thigh)
(National Institute of Health or NIH Vitamin B12 shots are normally available by prescription only, although dosage varies depending on age and medical history
Oral B12 supplements are available in tablet, capsule, or sublingual form
This is a clinical decision rather than a reason to describe injections as generally superior
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