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Effects of short-term treatment with metformin on serum concentrations of homocysteine, folate and vitamin B12 in type 2 diabetes mellitus: a randomized, placebo-controlled trial

Precautions Prior to taking vitamin B12, tell the physician that you have: A cold or an allergy that affects your nasal cavity and the signs you develop A kidney disease A liver disease Any kind of infection An iron deficiency A folic acid deficiency An allergy to vitamin B12 or cobalt A lebers disease as cyanocobalamin can trigger optical nerve damage and blindness A pregnancy, a plan to get pregnant or a breastfeeding baby.

Last reviewed: Jan 2020.

Co-authored by Lauren Baker, DVM, PhD This article was co-authored by Lauren Baker, DVM, PhD

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