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vitamin b12 injection intramuscular B-12 (Methylcobalamin) Therapy How to Give a B12
Description
I went for my 2nd dose yesterday
It uses a shorter, finer, needle and is supposed to be less painful (I can't say as I've never tried it)

As deficiency progresses, more specific signs emerge that warrant medical attention
A blood test is the only reliable way to determine whether B12 deficiency is causing fatigue

The best proof is a clear note in the medical record

Oral supplements are available in various forms in the market, for example: tablets, capsules, and sublingual (under the tongue) formulations
