What is another word for intrinsic factor?
Pronunciation: [ɪntɹˈɪnzɪk fˈaktə] (IPA) 
Intrinsic factor is a protein that is produced by the parietal cells of the stomach. It plays an important role in the absorption of vitamin B12 in the small intestine. Synonyms for intrinsic factor include gastric intrinsic factor, Castle's intrinsic factor, and IF. This protein is essential for the efficient uptake of vitamin B12, which is important for the production of DNA, red blood cells and proper brain function. Without intrinsic factor, the body is unable to absorb vitamin B12 and can lead to a deficiency, which can cause anemia, weakness, and fatigue. Intrinsic factor is a vital component of the digestive system and its role in vitamin B12 absorption cannot be overstated.
