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[16] Transport-mediated absorption and tissue delivery is a complex process involving three transport proteins: haptocorrin (HC), intrinsic factor (IF) and transcobalamin II (TC2), and respective membrane receptor proteins (Figure)
BMC Public Health 12: 394
Common side effects include injection site reactions (burning, pain, swelling, redness), headache, mild diarrhea, and upset stomach
When you have a B12 shot, the B12 is immediately absorbed into the bloodstream
for some of the changes, it has been demonstrated that they increase the concentration of the so-called inactive B12, but not the active B12
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