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Vitamin K is a family of structurally similar, fat-soluble vitamers found in foods and marketed as dietary supplements. [1] The human body requires vitamin K for post-synthesis modification of certain proteins that are required for blood coagulation ("K" from Danish koagulation, for "coagulation") or for controlling binding of calcium in bones and other tissues. [2]
Gut flora, that in adults produces vitamin K, has not yet developed. [2] Early VKDB is rare and caused by maternal medications that interact with vitamin K such as warfarin, phenytoin, or rifampicin. [2] Classical VKDB is more common and caused by the relative deficiency at birth with inadequate vitamin K intake.
Additional risk factors include 1) infants who never got a vitamin K shot at birth, even more so if they were solely breastfed, 2) infants who had mothers taking medications to treat seizures since these affect how the body uses vitamin K, 3) infants with diarrhea, cystic fibrosis, and celiac disease because this makes it hard to absorb ...
Vitamin K 1-deficiency may occur by disturbed intestinal uptake (such as would occur in a bile duct obstruction), by therapeutic or accidental intake of a vitamin K 1-antagonist such as warfarin, or, very rarely, by nutritional vitamin K 1 deficiency. As a result, Gla-residues are inadequately formed and the Gla-proteins are insufficiently active.
Vitamin K deficiency bleeding (VKDB) due to physiologically low vitamin K plasma concentrations is a serious risk for premature and term newborn and young infants. Untreated, consequences can cause brain damage or death. The prevalence of VKDB is reported at 0.25 to 1.7%, with higher risk in Asian populations. The recommended prevention ...
Phytomenadione, also known as vitamin K 1 or phylloquinone, is a vitamin found in food and used as a dietary supplement. [4] [5] It is on the World Health Organization's List of Essential Medicines. [6] It is used to treat certain bleeding disorders, [5] including warfarin overdose, vitamin K deficiency, and obstructive jaundice. [5]
Menadiol is an organic compound with the formula C 6 H 4 (COH) 2 (CH)(CH 3). It is formally a derivative of p-hydroquinone. The name vitamin K 4 can refer to: specifically this compound, [1] [2] its various esters, e.g. menadiol diacetate (acetomenaphthone), [3] [4] menadiol dibutyrate, [4] menadiol dimalonate, or [2] its various salts, like
MK-4 is the major form of Vitamin K in vertebrate animals, including humans and common forms of meat animals. It is produced via conversion of vitamin K 1 in the body, specifically in the testes, pancreas and arterial walls. [2] The conversion is not dependent on gut bacteria, occurring in germ-free rats [3] [4] and in parenterally-administered ...