What is vitamin K2?

Vitamin K2 (MK-7), also known as menaquinone, belongs to the vitamin K family. Vitamin K1 is another member of the vitamin K family but is mostly converted to K2 in the body to exhibit its effect. It is commonly available in animal-based foods like beef liver and fermented food like butter and cheese. It is an emerging vitamin with increasing awareness that comes with a lot of clinical support for its use, and the lack of vitamin K2 in our diet is often linked to several chronic diseases. 

Vitamin K2 is crucial for normal blood clotting that prevents excessive bleeding. It reduces the risk of heart diseases due to calcium build up in the arteries. A meta-analysis in 2019 suggested an increased dietary intake of vitamin K was linked with reduce risk of coronary heart diseases. Moreover, it contributes to bone health by regulating calcium metabolism and direct calcium to bones, lowering the risk of bone fracture. Studies also suggested vitamin K supplementation alongside vitamin D and sufficient fiber intake can prevent tooth loss due to periodontal diseases. 

Some studies also investigated the effect of vitamin K2 on inhibiting liver cancer cell growth but more results are needed to show its benefit of reducing liver cancer recurrence and survival rate. 

Using vitamin K2 is generally considered safe when taken appropriately, with minor reports on stomach side effects such as diarrhea and bloating. Individuals who are using anticoagulant medications (Blood thinners) such as warfarin shall avoid vitamin K2 and use it with caution. Seek professional advice if you would like to use vitamin K2 but are on blood thinners.