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Many of these symptoms are not specific to B12 deficiency but can also occur in other disorders
306). This is likely due to decreased digestive enzyme production or decreased stomach acid resulting in a decreased ability to cleave B12 from its carrier proteins in animal foods
Kwon Y et al
Talk with a healthcare professional if there are concerns about vitamin B12 levels
higher intakes are not routinely necessary for the general population and should be discussed with a healthcare professional, particularly for anyone with kidney disease
doi:10.1093/fampra/cml008
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