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[16] [121] Investigations into the intestinal absorption of B 12 confirm that the upper limit of absorption per single oral dose is about 1.5 g, with 50% efficiency
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For each dataset, 10 X-ray scattering signals (each registered with 1 s of X-ray exposure) were collected with 10 analogous signals of the buffer before and after each protein measurement
Additionally, the lack of stomach acid increases the amount of bacteria that use B12, making less of the vitamin available for the body to use
Neomycin, colchicine, para-aminosalicylic acid, or excessive alcohol intake longer than two weeks may cause malabsorption of vitamin B12. Chloramphenicol and other drugs having bone marrow suppressant properties may cause a lack of therapeutic response to vitamin B12
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