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If all the radioactivity is excreted with feces the patient is not able to absorb the vitamin, but if it enters the body the capacity for uptake of B12 remains
Chronic conditions impacting absorption include atrophic gastritis or pernicious anaemia, where there is a lack of intrinsic factor, a protein essential for the uptake of B12 in the digestive tract
The risk of copper deficiency in patients prescribed zinc supplements
Rnnbck et al., 2016)
This increase appeared to be maintained for 7 hours and then decreased in the eighth hour
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