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Why do people take vitamin B-12 (cobalamin)?

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Vitamin B-12 has been looked at as a treatment for many diseases and conditions. These include fatigue, Alzheimer's disease, heart disease, breast cancer, high cholesterol, and sickle cell disease. However, the results have been inconclusive. Studies suggest that vitamin B-12 does not help with stroke risk or lung cancer. Vitamin B-12 supplements do help people who have a deficiency. Low levels of vitamin B-12 are more likely in people over age 50. Vitamin B-12 is also more common in those with certain conditions, like digestive problems and some types of anemia. Low vitamin B-12 can cause fatigue, weakness, memory loss, and other problems with the nervous system.

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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How effective is vitamin B-12 (cobalamin) at treating elevated levels of homocysteine in the blood?

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