Vitamien K: Verskil tussen weergawes

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k Robot: standardiseer verwysingsjablone en voeg argiefskakels in.
k Robot: standardiseer verwysingsjablone en voeg argiefskakels in.
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[[Lêer:Phytomenadione (vitamin K1).jpg|duimnael|'n Monster van fitomenadioon (vitamien K<sub>1</sub>) vir inspuiting. Dit word ook fillokinoon genoem.]]
 
'''Vitamien K''' is 'n groep vetoplosbare vitamiene met 'n soortgelyke struktuur, wat die [[mens]]like liggaam benodig vir die omskakeling van sommige proteïne wat noodsaaklik is vir bloedstolling, en in metaboliese roetes in been- en ander weefsels. Hulle is 2-metiel-1,4-naftokinoon (3-) derivate. Die groep vitamiene sluit ook twee natuurlike '''vitamere''' in: vitamien K<sub>1</sub> en vitamien K<sub>2</sub>.<ref>{{cite web |title=Vitamin K Overview |url=http://www.umm.edu/altmed/articles/vitamin-k-000343.htm |work=University of Maryland Medical Center |language=en |archive-url=https://web.archive.org/web/20130522002251/http://www.umm.edu:80/altmed/articles/vitamin-k-000343.htm |archive-date=22 Mei 2013 |url-status=live |df=dmy-all}}</ref>
 
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== Vitamin K absorption and dietary need ==
Previous theory held that dietary deficiency is extremely rare unless the intestine (small bowel) was heavily damaged, resulting in [[malabsorption]] of the molecule. Another at-risk group for deficiency were those subject to decreased production of K<sub>2</sub> by normal intestinal microbiota, as seen in [[broad spectrum antibiotic]] use.<ref>{{cite web |title=Vitamin K |access-date=26 Mei 2009 |url=http://www.nlm.nih.gov/medlineplus/druginfo/natural/patient-vitamink.html |work=National Institute of Health |language=en |archive-url=https://web.archive.org/web/20100726213556/http://www.nlm.nih.gov:80/medlineplus/druginfo/natural/patient-vitamink.html |archive-date=26 Julie 2010 |url-status=dead |df=dmy-all}}</ref> Taking broad-spectrum antibiotics can reduce vitamin K production in the gut by nearly 74% in people compared with those not taking these antibiotics.
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