Peter Hibberd, M.D., is a doctor whose advice is based on more than 28 years of hospital outpatient and inpatient experience. He is an experienced emergency medicine physician, surgeon, and consultant. Dr. Hibberd is certified by the American Board of Emergency Medicine. He is also a fellow and active member of the American Academy of Family Physicians, an active member of the American College of Emergency Physicians, and a member and fellow of the American Academy of Emergency Medicine. Dr. Hibberd has earned numerous national and international professional certifications, memberships, and awards.
Tags: vitamin | deficiency | fatigue | anemia | b12

Can a Vitamin Deficiency Cause My Fatigue?

By Peter Hibberd, M.D.   |   Wednesday, 24 Apr 2013 05:41 PM

Question: I have suddenly starting feeling very fatigued. In the past I have been told I have a vitamin B12 deficiency. Could this be the problem?

Dr. Hibberd’s answer:

Vitamin B12 deficiency will cause fatigue. If you have a documented B12 deficiency, replacement of your B12 by “sublingual” B12 — a pill placed under the tongue — may be preferable to a B12 injection. In any case, it is prudent for you to see your personal physician for a health review and appraisal before you embark on self-treatment of fatigue.
If you have a B12 deficiency, a blood test could determine if you are anemic. If not, other causes should be looked for. Don’t forget that fatigue can be a symptom of underlying diseases, including heart disease, infection, cancer, and endocrine disorders such as diabetes and thyroid disorder.

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Vitamin B12 deficiency can cause fatigue, but you should see a doctor to determine what might be causing your symptoms.

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