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A 45-year-old member asked:

Is 2500 mcg a day too much of vitamin b-12?

1 doctor answer9 doctors weighed in
Dr. Pamela Pappas
Psychiatry 42 years experience
Vitamin B12: In B12 deficiency, doses of 300-10, 000 mcg (microgram) by mouth daily have been used. 2500 mcg per day is not too much.
Dr. J. Lawrence Dohan
Dermatology 57 years experience
1000 is plenty. But no harm if more.
May 12, 2014

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A 41-year-old member asked:

How do I know how much vitamin b-12 should I take a day?

1 doctor answer1 doctor weighed in
Dr. Eric Weisman
Neurology 36 years experience
Check your level.: You want to keep your B12 level in the blood above 350. You would first check a level. If it low you can try to fix the problem with mega doses of B12 by mouth or 1.2 mg sublingually (by-pass the malfunctioning GI tract).

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Last updated Apr 7, 2018

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