gastric intrinsic factor

gastric intrinsic factor (GIF),

n a substance secreted by the gastric mucosa that is essential for the intestinal absorption of vitamin B12; also known as
intrinsic factor.
References in periodicals archive ?
But its absorption requires presence of gastric intrinsic factor (IF) which is secreted by the parietal cells.
This belief is still being propagated, as this quote from an article published recently attests: "Pernicious anemia is caused by inadequate secretion of gastric intrinsic factor necessary for vitamin [B.
Conservative estimates indicate that 2-3% of this population has, or will develop, pernicious anemia, caused by failure of gastric intrinsic factor production, resulting in B12 mal-absorption.