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It is vital in a number of different biological processes
Archived from the original on January 25, 2012
Vitamin B12 injections are a vital treatment for those with pernicious anaemia, a condition characterized by a lack of intrinsic factor a protein that binds and absorbs vitamin B12
People with known sleep disorders : the metabolic activation effect can worsen insomnia if dosed late in the day
This deficiency is often found in vegetarian people
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