Abstract

Vitamin K is essential for the synthesis of blood clotting factors II, VII, IX and X.¹ Newborn babies have little or no vitamin K; and, to prevent bleeding, supplements are commonly given at birth.² A recent study suggests that supplements given by intramuscular injection, but not by mouth increase the risk of cancer in childhood.³ Are vitamin K supplements really necessary for newborn babies? If so, how should they be given?