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Vitamin K deficiency is rare.
Individuals taking medications like blood thinners that affect vitamin K absorption are also at risk of a deficiency.
Signs of Vitamin K Deficiency
Signs of vitamin K deficiency only occur in severe cases in adults.
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Who Is at Risk?
Medications or supplements that interfere with vitamin K absorption or metabolism can also lead to a deficiency.
In addition, human milk is low in vitamin K, making some infants prone to vitamin K deficiency.
The shot is usually given within an hour after birth but can be administered within six hours.
Partial or complete blockages within the coronary arteries cause heart attacks.
For example, astool fat testmay be ordered if a healthcare provider suspects fat malabsorption.
In such cases, vitamin K is administered as a shot into the fatty tissue (subcutaneously).
A vitamin K deficiency is rare in healthy individuals.
Excessive bleeding is the primary sign of vitamin K deficiency.
Shea MK, Booth SL.Vitamin K.Adv Nutr.
2022;13(1):350-351. doi:10.1093/advances/nmab133
Johnson LE.Vitamin K deficiency.
InMerck Manual Professional Version.
Merck & Co., Inc. 2024.
Office of Dietary Supplements.Vitamin K: fact sheet for health professionals.
2021;10(16):e020551.
doi:10.1161/JAHA.120.020551
National Cancer Institute.Fat-soluble vitamin.
National Heart, Lung, and Blood Institute.What is athersclerosis?
2023;13(9):1349. doi:10.3390/jpm13091349
American Heart Association.Atherosclerosis.
