Vitamin K₂ is also known as methyl naphthoquinone, mainly from cheese, natto and other fermented foods, as well as the synthesis of intestinal flora, and its role has a lot of common to accelerate blood clotting, prevention of osteoporosis, protection of the liver and so on. 1. Accelerate blood clotting: Vitamin K₂ deficiency is an important cause of bleeding disorders in the human body, even vitamin K₁ and K₃ need to be converted into vitamin K₂ in the body before it can play a role, so vitamin k2 can promote the formation of plasminogen, to help the body to accelerate coagulation and to maintain a normal blood clotting time. 2. Prevent osteoporosis: Vitamin K₂ can act on osteoblasts, inhibiting osteoclasts to cause bone resorption on the basis of, but also can promote bone tissue calcification, thus improving bone density, prevent osteoporosis and fractures. 3. Protect the liver: the liver is a highly regenerative organ, when there are acute and chronic injuries, activation of liver ovalbumin cells can promote liver recovery, and vitamin K₂ can stimulate the proliferation of ovalbumin cells, which has an important role in the regeneration of liver cells. Vitamin K₂ is very important for the human body and prompt medical attention is needed if a vitamin K₂ deficiency is suspected.