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Vitamin K (phylloquinone) can be produced in the intestines and this function is improved with the presence of cultured milk, like yogurt, in the diet, Vitamin K is classified as a fat-soluble vitamin.
Vitamin K is found in nature in two forms - K1, also called phylloquinone, is found in plants and vitamin K2, also called menaquinone, which can be synthesized by many bacteria. Vitamin K3, menadione, is a synthetic form of this vitamin which is manmade.
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Vitamin K is used in the body to control blood clotting and is essential for synthesizing the liver protein that controls the clotting. It is involved in creating the important prothrombin, which is the precursor to thrombin - a very important factor in blood clotting. It is also involved in bone formation and repair. In the intestines it also assists in converting glucose to glycogen, this can then be stored in the liver. There are some indications that Vitamin K may decrease the incidence or severity of osteoporosis and slow bone loss.
A deficiency of this vitamin in newborn babies results in hemorrhagic disease, as well as postoperative bleeding and hematuria while muscle hematomas and inter-cranial hemorrhages have been reported.
A shortage of this vitamin may manifest itself in nosebleeds, internal hemorrhaging.
The dosage underneath is the Recommended Dietary Allowance (RDA), but be aware that this dosage is the minimum that you require per day, to ward off serious deficiency of this particular nutrient. In the therapeutic use of this nutrient, the dosage is usually increased considerably, but the toxicity level must be kept in mind.
Males 80 micrograms per day and females 70 micrograms per day.
Toxicity does not easily occur with normal dietary intake of this vitamin, but can happen if synthetic compound vitamin K 3 is taken. High to toxic uptake in the synthetic form can cause flushing and sweating. Jaundice and anemia may also develop.
If you are taking anti-coagulant (to prevent blood clotting) medication, consult your medical practitioner before taking a Vitamin K supplement.
Dietary fat is necessary for the absorption of this vitamin.
This nutrient can be destroyed by freezing and radiation as well as air pollution. Absorption may be decreased when rancid fats are present, as well as excessive refined sugar, antibiotics, high dosages of vitamin E, or calcium and mineral oils.
When you are prone to bruising easily, or when pregnant you might be in need of more Vitamin K. But be careful not to take too much Vitamin K in the last stages of pregnancy, since it could be toxic for the baby.
Some people are of the opinion that it also promotes longevity.
Vitamin K is found in leafy vegetables (especially spinach and celery), cheese and liver. It is also found in asparagus, coffee, bacon and green tea.
None.
Other fat-soluble vitamins:
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