A member asked:

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

A doctor has provided 1 answer
Dr. Eric Weisman answered

Specializes in Neurology

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).

Answered 6/24/2014

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