intrinsic factor

noun

, Biochemistry.

1. a glycoprotein, secreted by the gastric mucosa, that is involved in the intestinal absorption of vitamin B 12 .

intrinsic factor

noun

1. biochem a glycoprotein, secreted by the stomach, the presence of which is necessary for the absorption of cyanocobalamin (vitamin B 12 ) in the intestine

Word History and Origins

Origin of intrinsic factor¹

First recorded in 1925–30

Example Sentences

Production of gastric acid and intrinsic factor by the specialized parietal cells in the stomach is critical for B12 absorption to occur.

From Salon

However, people whose stomachs don’t secrete enough intrinsic factor may need B12 injections.

From Seattle Times

Additional research is required to learn if psychiatric concerns may be due to intrinsic factors caused by the virus compared to external factors.

From Washington Times

"The breathing exercises can help keep the lungs fully expanded as much as possible, but will it keep you from having worse symptoms? No, that's really dependent on so many other intrinsic factors," Galiatsatos said.

From Salon

In all three studies participants attributed more egalitarian views to a scientist if the evidence indicated that extrinsic factors shapes behavior more than intrinsic factors.

From Scientific American