5 doctors weighed in:

What are the side effects of too much B-12, should I be taking a supplement if I'm not deficient?

5 doctors weighed in
Dr. Martin Fried
General Practice
4 doctors agree

In brief: No

In rare cases, excess B12 supplementation may cause some numbness or tingling in the arm, hands and face.
You shouldn't take the vitamin if you don't have a specific dietary deficiency.

In brief: No

In rare cases, excess B12 supplementation may cause some numbness or tingling in the arm, hands and face.
You shouldn't take the vitamin if you don't have a specific dietary deficiency.
Dr. Martin Fried
Dr. Martin Fried
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