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A substance secreted by the stomach which enables the body to absorb vitamin B₁₂. It is a glycoprotein.
- ‘In most cases, vitamin B12 deficiency happens because the stomach cannot produce enough of a substance called intrinsic factor, which is needed for vitamin B12 to be absorbed.’
- ‘The detection of serum antibodies to intrinsic factor and an elevated serum gastrin level confirmed the diagnosis of pernicious anemia.’
- ‘The vitamin is then bound by intrinsic factor, a protein secreted by parietal cells of the stomach, and carried to the ileum where it is absorbed.’
- ‘Your stomach needs to secrete intrinsic factor in order to absorb B12, and if for some reason it doesn't, you will need to have regular vitamin B12 injections.’
- ‘Without intrinsic factor, vitamin B - 12 can't be absorbed and leaves the body as waste.’
We take a look at several popular, though confusing, punctuation marks.
From Afghanistan to Zimbabwe, discover surprising and intriguing language facts from around the globe.
The definitions of ‘buddy’ and ‘bro’ in the OED have recently been revised. We explore their history and increase in popularity.