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Who should not take B12?

Because it is not quite clear if B12 causes harm to a developing fetus, pregnant women should take B12 with extreme caution. People with the conditions hemochromatosis or hemosiderosis should not take B12 because of the possibility of iron overdose. People with Leber's disease (an inherited eye disorder) should not take B12 as it may worsen the disease considerably.

Continue Learning about Vitamin B12

why is vitamin b12 deficiency so common ?
Stacy Wiegman, PharmDStacy Wiegman, PharmD
Vitamin B12 deficiency is common because some groups don't get enough B12 in their diets, and ot...
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what is the recommended dietary allowance ( rda ) of vitamin b12 ?
Stacy Wiegman, PharmDStacy Wiegman, PharmD
The recommended dietary allowance (RDA) of vitamin B12 varies depending upon your age. For child...
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can vitamin b12 help to prevent Alzheimer disease ?
Stacy Wiegman, PharmDStacy Wiegman, PharmD
Currently there is no solid evidence that vitamin B12 can prevent Alzheimer's disease, but resea...
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how is vitamin b12 deficiency treated ?
how is vitamin b12 deficiency treated ?

Important: This content reflects information from various individuals and organizations and may offer alternative or opposing points of view. It should not be used for medical advice, diagnosis or treatment. As always, you should consult with your healthcare provider about your specific health needs.