Definition of vitamin K in English:

vitamin K


  • Any of a group of vitamins found mainly in green leaves and essential for the blood-clotting process. They include phylloquinone (vitamin K₁), menaquinone (vitamin K₂), and menadione (vitamin K₃).

    ‘It interferes with the body's natural chemical process of clotting, by targeting an essential substance called vitamin K.’
    • ‘Selecting products with selected other nutrients such as vitamin D and vitamin K was discussed.’
    • ‘One such product is vitamin K, a substance essential for blood clotting.’
    • ‘The richest sources of vitamin K 1 are dark green leafy vegetables including broccoli, lettuce, cabbage, spinach and green tea.’
    • ‘With the help of calcium, vitamin K, and a protein called fibrinogen, the platelets create a mesh to hold the plug in place and close the wound.’
    • ‘Vitamin E can interfere with the action of vitamin K (which promotes blood clotting).’
    • ‘Although vitamin K is usually identified as a critical factor in blood coagulation, recent research has found that vitamin K is also a cofactor in bone metabolism.’
    • ‘Few, if any, multiple vitamin and mineral supplements contain vitamin K2.’
    • ‘Some causes of acquired factor deficiencies include liver disease, vitamin K deficiency, and drug therapy.’
    • ‘The watercress meets almost your entire day's need for vitamin K, and the apple provides fiber, plus vitamins A and C.’
    • ‘We get vitamins from food and drink; vitamin K and some of the B's are produced by bacteria in our intestines.’
    • ‘There were no differences between vitamin K from broccoli and vitamin K from oil overall.’
    • ‘One other vitamin has a letter: vitamin K, a substance required for the clotting of blood.’
    • ‘However, formula fed infants are resistant to oral anticoagulants because of a high concentration of vitamin K in their diet.’
    • ‘Injected into the thigh muscle of newborns, vitamin K is given to enhance blood clotting and prevent hemorrhaging.’
    • ‘For example, bacteria in the gut regularly synthesize vitamin K, which is important for blood clotting.’
    • ‘Newborns lack the ability to make vitamin K, which is needed for blood clotting, for a few days after birth.’
    • ‘Studies have found a direct relationship between blood levels of vitamin K and bone mineral density.’
    • ‘If the patient is at risk for hemorrhage, low-dose oral vitamin K1 also should be given.’
    • ‘A large dose of vitamin K1 should also be given.’


vitamin K

/ˈvīdəmən kā/ /ˈvaɪdəmən keɪ/