b12 injection subq or im Best Vitamin Site: Administering B12 Shots Choosing the Right Needle and

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Mild nausea, reported by a small number of patients after the first one or two injections

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Vitamin B12 injections are also used by people with impaired vitamin B12 absorption or deficiency called Pernicious anaemia caused by: Inadequate dietary intake of B12 Loss of gastric parietal cells in chronic atrophic gastritis Structural damage or surgical resection of the small intestine or stomach Long-term use of acid regulating medication Alcoholism Gastric banding surgery Celiacs disease Pernicious anaemia Crohns disease Until now, injection of methyl-B12 has required a needle