Here's what to know about this important nutrient, why it matters and whether vitamin K shots are actually safe or effective.

Vitamin K is a fat-soluble vitamin that rarely requires supplementation, except in newborns, as it is easily obtained through the diet and deficiency is rare. It's primary role in the body is to help ...

New research shows that an increasing number of newborns are not receiving a vitamin K injection designed to prevent excessive bleeding. The percentage of babies that did not receive a vitamin K shot ...

This story originally appeared as an article on the Bloomberg School of Public Health website and was summarized in The Uptake, a weekly newsletter offering expert insights from the Bloomberg School ...