What is vitamin K1´s main function?
-Vitamin K1 (Phylloquinone, Phytonadione) is the form used in the liver to activate clotting factors.
What is vitamin K2 and its main function?
-Vitamin K2 (Menaquinone) is one of the naturally occuring forms of vitamin K. Vitamin K2 has several subtypes, which differ in isoprenoid chain length. Menaquinones are abbreviated MK-n, where M stands for menaquinone, the K stands for vitamin K, and the n represents the number of isoprenoid side chain residues. Vitamin K2 is the form used in the rest of the body to activate vitamin K-dependent proteins.
What are the main differences between vitamin K2 MK-4, vitamin K2 MK-7 and vitamin K2 MK-9?
-Vitamin K2-4 (MK-4) is produced from vitamin K3 (also known as menadione, often used in animal feed) and its a short chain menaquinone. Obviously, MK-4 also belongs to the K2 family and is predominately found in meat, but can also be found in fermented products, certain types of cheese, butter, chicken egg yolk and natto (fermented soy beans).