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Supplements with a variety of B vitamins in them will have less B12 than a standalone B12 pill
Each vial contains 40 mg of B12
Peter Attia MD
We get lots of emails about B12 shots: Yes, if youre diagnosed with pernicious anemia, you absolutely need them
After initial repletion, a maintenance dose is given, often 1,000 mcg intramuscularly every month or every 2 to 3 months, to prevent recurrence of deficiency
Knowing the B12 shots strength is important
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