ORAL: Vitamin B12 deficiency of dietary origin: Adults: 50-150 mcg daily taken between meals
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Brion, V
In some cases, injections may be given daily or several times per week at the beginning of therapy, and then the interval may be extended or switched to oral tablets once vitamin levels and symptoms improve
Intramuscular (IM) Injection Techniques Intramuscular injections are a common way to give Vitamin B12