Vitamin K

Vitamin K is produced by naturally occurring intestinal bacteria, but can also be found in many foods. It is required for the formation of six or so coagulation factors and is essential for the blood clotting process.

And if I don't get enough?

The main result of a vitamin K deficiency is problems with the coagulation (clotting) of blood. It can occur in premature infants who haven't built up adequate vitamin K stores.

 

And if I get too much?

There have been no reports of vitamin K toxicity from natural food sources. There have been reports, however, that a synthetic version (menadione) can cause anemia and jaundice. 

 

Sources

The richest source of Vitamin K is leafy green vegetables.

There is no research suggesting a benefit for normal children and adults by taking a vitamin K supplement. The bacteria living in your intestines generally produce all the vitamin K needed.

Natural vitamin K from plants is known as phylloquinone. The vitamin K made by bacteria is called menaquinone.

 

Caution

Vitamin K should not be taken by people who are taking anticoagulant medications. The vitamin K directly counteracts the intended effect of the medication.