EmpeiriaAbsorbing vitamin B12
Clinically: Vitamin B12 absorption
B12 absorption needs two organs working together: the stomach makes a carrier protein, and the far end of the small intestine takes up the pair. The liver holds several years' worth in reserve, so a shortage develops slowly.
unverified These explanations are written to be easy to read and have not yet been checked against a source. The ranges and measurement notes on this page show theirs.
function unverified
Absorbing B12 takes two steps in two places. Your stomach makes a protein that grabs the vitamin, and the last part of your small intestine absorbs the two together. Problems in either place cause a shortage, and because your liver stores years of it, that shortage builds up very slowly.
Absorbing B12 takes two steps in two places. Your stomach makes a protein that grabs the vitamin, and the last part of your small intestine absorbs the two together. Problems in either place cause a shortage, and because your liver stores years of it, that shortage builds up very slowly.
No clinical version written yet.
In clinical terms
Intrinsic factor secreted by gastric parietal cells binds cobalamin for receptor- mediated uptake in the terminal ileum.