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The process only takes a few minutes and is virtually painless
In people without pernicious anemia, about 0.5 g/day of B12 is reabsorbed by enterohepatic circulation in which B12-containing bile is secreted by the liver into the digestive tract where the B12 is then reabsorbed via intrinsic factor
The form of B12 matters too
PMCID: PMC10967710
The human body doesnt naturally produce vitamin B12, so if you dont have it in your diet, you might be at risk of deficiency
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