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But for most purposes (like weekly maintenance injections), IM is the preferred route at home because its simpler (the vitamins absorb quickly from muscle into the bloodstream over a few hours)
Some studies suggest that people with obesity may be more likely to have a vitamin B12 deficiency
Avoid treating a hangover with more alcohol, as this is likely to worsen it
Indiscriminate administration of vitamin B12 may mask the true diagnosis of pernicious anemia
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