Vitamin K update

Discovered in the early 1930s, vitamin K was given its name "K" after the first letter of the German word "koagulation," due to its blood clotting effects. Since then, our knowledge base has expanded on this essential micronutrient.

What it is: Vitamin K is a fat-soluble vitamin that comes in two forms. Phylloquinone (K1), found in plants, provides most of the vitamin K in our diets. Menaquinones (K2) is a group of compounds found mostly in fish, oils and meats, and is also made by gut bacteria.

What it does: Vitamin K is important in blood clotting; it acts as a coenzyme in the production of prothrombin and assists in the creation of three more...