Vitamin K plays a critical role in helping your blood clot properly.It is so important that all newborns receive an injection immediately after birth to prevent bleeding. The vitamin is found most commonly in leafy green vegetables and is made by bacteria in the intestine.
Since newborns do not have bacteria established, they need supplemental vitamin K.
An Adequate Intake level of 120 micrograms for men and 90 micrograms for women was set. Because no adverse effects have been reported for vitamin K, no upper limit was set by the committee.
There are several reports that low vitamin K may be related to osteoporosis, but the committee concluded the evidence was not strong enough to establish this. This nutrient is most important for people taking anticoagulants or blood thinners. Greatly varying intake of rich sources of vitamin K can interfere with proper function of your medication.