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It's easily created through the bacterial fermentation process, which uses a set of Propionibacterium to produce a variety of cobalamins, including methylcobalamin, hydroxocobalamin, and adenosylcobalamin
tumour Biol 1991;12:353-9
Wilson's disease or other copper-handling disorders
Summary The most common cause of severe vitamin B12 deficiency in the UK is pernicious anaemia
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Some practitioners implement cycling to theoretically prevent receptor desensitization, provide physiological breaks, or manage costs, though evidence supporting these approaches is limited
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