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In contrast, the passive diffusion process of B 12 absorption normally a very small portion of total absorption of the vitamin from food consumption may exceed the haptocorrin- and IF-mediated absorption when oral doses of B 12 are very large, with roughly 1% efficiency
Archived from the original on 27 September 2007
10.1016/s0006-8993(00)02816-x 33 KangE
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