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Why can obstructive jaundice or chronic diarrhea lead to vitamin K deficiency?
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bleeding and blood clotting
Red blood cells (erythrocytes) trapped in a mesh of fibrin threads. Fibrin, a tough, insoluble protein formed after injury to the blood vessels, is an essential component of blood clots.
Vitamin K is a fat-soluble vitamin, meaning its absorption in the small intestine relies on the presence of bile salts to form micelles, which transport the vitamin across the intestinal lining.123
- Obstructive Jaundice: In cases of obstructive jaundice, the flow of bile into the bowel is interrupted. Without these bile salts, the body cannot efficiently absorb fat-soluble vitamins, leading to a deficiency.4516
- Chronic Diarrhea: Conditions such as chronic diarrhea often involve general impairment of intestinal function or poor fat absorption. Because vitamin K absorption is dependent on the same processes as fat absorption, any interference with these mechanisms inhibits the uptake of the vitamin.2573
A deficiency in vitamin K prevents the liver from synthesizing essential blood-clotting proteins, such as prothrombin, which significantly increases the risk of hemorrhage and prolonged bleeding.4657