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A test helps confirm whether B12 is actually the issue and whether there may be other causes of fatigue

Conversely, numbing the injection site with ice for 30-60 seconds before injecting reduces pain perception

Although diverticula rarely cause symptoms, diverticulitis can cause bloating, diarrhea, constipation, or blood in your stool

The correct dosage of B12 varies considerably depending on whether you are maintaining adequate levels, preventing deficiency, or treating diagnosed B12 deficiency

You have an active infection, fever, or a skin infection at the IV site, because IV placement should wait until the infection has fully resolved

Kim JS, Vashist YK, Thieltges S, Zehler O, Gawad KA, Yekebas EF, Izbicki JR, Kutup A