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is high vitamin b12 dangerous

A 38-year-old member asked:
Dr. Lewis Dickinson
49 years experience Internal Medicine
Ingesting much B12.: No known adverse effect of too much vitamin B12 in blood. You may not need to take any b12.
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A 46-year-old member asked:
Dr. Thomas Namey
47 years experience Rheumatology
Nothing.: None toxic and will simply be urinated out, after your body's stores are filled. I take 2500mcg/day! for years!
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1 thank
A 31-year-old female asked:
Dr. Milton Alvis, jr
40 years experience Preventive Medicine
Intake + Absorption: Vitamin b12, aka cyanocobalamin, is common in a huge variety of foods; low intake rare. However, none of us absorb B12 directly. Instead, the cells of ... Read More
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4 thanks
A 41-year-old female asked:
Dr. Julie Abbott
44 years experience Preventive Medicine
Nothing definitive: A few studies have been done which show influence in both directions: post-menopausal women who took vitamin B12 (and other) supplements showed increa ... Read More
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1 thank
A 73-year-old female asked:
Dr. Bennett Machanic
51 years experience Neurology
Comments: Am not personally troubled when my patients' B-12 comes back elevated, as it is truly unlikely that there will be any problem in near or distant futur ... Read More
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1 thank
A 34-year-old female asked:
Dr. Ed Friedlander
43 years experience Pathology
No: This should not cause any concern at all if you are otherwise well. Some folks run a little bit high levels of the carrying protein.
A 37-year-old member asked:
Dr. Stevan Cordas
56 years experience Internal Medicine
High B12: Usually taking too much. Sometimes liver disease.
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1 thank
A 30-year-old male asked:
Dr. Randy Baker
39 years experience Holistic Medicine
The other way around: Vitamin B12 is not known to be toxic in any amount. However, one of the causes of high blood levels of B12 is liver disease including hepatitis ; cirr ... Read More
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1 thank
A 47-year-old member asked:
Dr. Douglas Tavenner, jr.
49 years experience Cosmetic Dentistry
Study Links:: 1) http://en.Wikipedia.Org/wiki/vitamin_b12_deficiency 2) http://www.Doctoroz.Com/videos/end-your-energy-crisis-vitamin-b12 3) http://chriskresser.C ... Read More
A 38-year-old member asked:
Dr. Clarence Wimberly
Specializes in Family Medicine
Vit. B12: B vitamins do not stay in your body and if not used by you they are excreted in the urine, therefore excessive amounts of B12 will not hurt you.
17
17 thanks

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