Identify the problem associated with vitamin K deficiency and who is most at risk for K deficiency and why. How is it prevented?
The main function of vitamin K is to help activate proteins that help clot the blood, so vitamin K deficiency causes uncontrolled bleeding. Newborn infants are most at risk for vitamin K deficiency because they are born with a sterile intestinal tract and the vitamin K–producing bacteria take weeks to establish themselves. To prevent hemorrhage, the newborn is given a single dose of vitamin K at birth. People who have taken antibiotics that have killed the bacteria in their intestinal tracts also may develop vitamin K deficiency. Supplements of vitamin K are needed in these cases.
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