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What are the risks of taking vitamin B-12 (cobalamin)?

ANSWER

Taken at normal doses, side effects are rare. High doses may cause acne. Some people can be allergic to vitamin B-12 supplements. The can have swelling, itchy skin, and go into shock. Also, drugs for acid reflux, diabetes, and other conditions may make it harder for your body to absorb vitamin B-12.

SOURCES:

Longe, J., ed. , second edition, 2004. The Gale Encyclopedia of Alternative Medicine

Natural Standard Patient Monograph: "Vitamin B-12."

Office of Dietary Supplements web site: "Vitamin B-12."

Toole J.F. 2004. Journal of the American Medical Association,

Hanley, D.F. 2004. Journal of the American Medical Association,

Landgren, F. , 1995. Journal of Internal Medicine

Christensen, B. , 1999. Atherosclerosis

Nallamothu, B.K. , 2000. Archives of Internal Medicine

Christen, W.G. , 2009. Archives of Internal Medicine

Reviewed by Nayana Ambardekar on January 20, 2019

SOURCES:

Longe, J., ed. , second edition, 2004. The Gale Encyclopedia of Alternative Medicine

Natural Standard Patient Monograph: "Vitamin B-12."

Office of Dietary Supplements web site: "Vitamin B-12."

Toole J.F. 2004. Journal of the American Medical Association,

Hanley, D.F. 2004. Journal of the American Medical Association,

Landgren, F. , 1995. Journal of Internal Medicine

Christensen, B. , 1999. Atherosclerosis

Nallamothu, B.K. , 2000. Archives of Internal Medicine

Christen, W.G. , 2009. Archives of Internal Medicine

Reviewed by Nayana Ambardekar on January 20, 2019

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