Vitamins are necessary to avoid deficiency diseases which are measured by daily value quantities such as 90 mg vitamin C for preventing scurvy, 600 IU vitamin D for preventing rickets, and so on. Vitamin K2 is the term for a group of compounds called menaquinones, which can be found mostly in dairy products. Almost all K vitamins are similar in structure, but different in the length of the side chain. The longer the side chain, the better effect and efficiency. 更多
