What is vitamin K2?

Vitamin K-2 is a part of a group of compounds that makes up Vitamin K, as stated by WebMD. Vitamin K-2 is usually obtained from meat, eggs and cheese. Some bacteria are also able to synthesize vitamin K-2.

Vitamin K is important for helping the body prevent excess bleeding by maintaining the ability to clot blood, according to WebMD. While not typically used as a dietary supplement, newborn infants and people suffering from celiac and Crohn's disease are sometimes given injections of the compound. There are studies on the effectiveness of using Vitamin K for the treatment of osteoporosis and bone loss from steroid use. However, as of 2015, results are conflicting.