Deficiencies in newborns are associated with hemorrhagic disease of the newborn (also called vitamin K deficiency bleeding or VKDB). This can cause bleeding and bruising and, in severe cases, can lead to fatal bleeding into the brain.
https://labtestsonline.org/understanding/conditions/vitamink/start/1
Vitamin K is a vitamin found in leafy green vegetables, broccoli, and Brussels sprouts. The name vitamin K comes from the German word “Koagulationsvitamin.”. Several forms of vitamin K are used around the world as medicine. Vitamin K1 (phytonadione) and vitamin K2 (menaquinone) are available in North America. Vitamin K1 is generally the preferred form of vitamin K because it is less toxic, works faster, is stronger, and works better for certain conditions. In the body, vitamin K plays a major role in blood clotting.
https://medlineplus.gov/druginfo/natural/983.html
Causes of Vitamin K Deficiency. The most common causes of vitamin K deficiency are insufficient dietary intake, inadequate absorption, and decreased storage of the vitamin due to liver disease, but it may also be caused by decreased production in the intestines.
https://labtestsonline.org/understanding/conditions/vitamink/start/1
1 Taking vitamin K by mouth or injecting it intravenously (by IV) helps prevent bleeding in individuals with VKCFD.  Reversing the effects of too much warfarin used to prevent blood clotting. Taking vitamin K1 by mouth or as in injection into the vein can counteract too much anticoagulation caused by warfarin.
https://medlineplus.gov/druginfo/natural/983.html
1 doctor agreed: No: Low vitamin k can cause your body to have a difficult time making factors that are important for blood coagulation (factors 2, 7, 9, 10) and can lead to increased bleeding. Platelet numbers, however, should not be affected. ...Read more.
https://www.healthtap.com/topics/blood-platelets-vitamin-k
Vitamin K is a vitamin found in leafy green vegetables, broccoli, and Brussels sprouts. Several forms of vitamin K are used around the world as medicine. Vitamin K1 (phytonadione) and vitamin K2 (menaquinone) are available in North America.
https://medlineplus.gov/druginfo/natural/983.html
Vitamin k: Reverses the effects of Coumadin which thins the blood and increases the inr. It is usually administered if the inr is over 7 + or lower if there is active bleeding or you need emergency surgery. If the inr is elevated and you are not on Coumadin then you need a workup to determine the cause.
https://www.healthtap.com/topics/blood-platelets-vitamin-k
Some medications, such as antibiotics, antacids, and anti-seizure medications can interfere with the absorption of vitamin K1, decrease the quantity of K2 produced in the intestines, or cause degredation of vitamin K. High doses of aspirin may increase vitamin K requirements.
https://labtestsonline.org/understanding/conditions/vitamink/start/1
In the U.S., dietary deficiency of vitamin K is rare in healthy individuals but is relatively common in those who are severely ill or who have certain chronic conditions.
https://labtestsonline.org/understanding/conditions/vitamink/start/1
Vitamin K is a group of structurally similar, fat-soluble vitamins the human body requires for complete synthesis of certain proteins that are prerequisites for blood coagulation that the body needs for controlling binding of calcium in bones and other tissues.
https://en.wikipedia.org/wiki/Vitamin_K
what causes vitamin k to raise in the blood?
Vitamin K can be  raised in the blood with leafy green vegetables, broccoli, and Brussels sprouts. Leafy green vegetables, broccoli, and Brussels sprouts causes vitamin K to raise in the blood. Leafy green vegetables, broccoli, and Brussels sprouts cause vitamin K to raise in the blood. 