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High-dose oral B12 is not routinely used for pernicious anaemia management in NHS practice
For example, if you're in the hospital and your doctor orders medically necessary B12 shots to treat anemia, a gastrointestinal disorder, neuropathy, or some other health issue caused by B12 deficiency, Medicare Part A may provide coverage
PMID 28780990
In fact, vitamin B12 has been shown to accelerate alcohol hangover recovery, so if you drink alcohol, you may benefit from additional vitamin B12 shots for reasons not related to weight loss
People with Digestive Issues Certain gut conditions can hinder B12 absorption, for example, Crohns disease and celiac disease