Vitamin K2 ( Vitamin K-2 ) 60 tabs, from Source Naturals

Vitamin K2 Supports Bone Health Vitamin K2 (Vitamin K-2) is a more biologically active form of vitamin K extracted from a fermented Japanese soyfood called natto, a powerhouse of nutrients. Fat-soluble, it is an essential cofactor for the production of proteins that bind calcium - supporting cardiovascular and bone health. Vitamin K2 is more efficient than K1 because it remains in circulation longer and is active in more tissues.