side effects of too much b12 injections Vitamin Injection Treating Severe Vitamin B12 Deficiency

J Soc Gynecol Investig

Overgrowth of bacteria: Some people develop vitamin B 12 deficiency as a result of conditions that slow the movement of food through the intestines (diabetes, scleroderma, strictures, diverticula), allowing intestinal bacteria to multiply and overgrow in the upper part of the small intestine

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