Vitamin K for Bone Health
Bones need vitamin K. You probably get enough in your diet.
Some studies, many of them conducted in Japan, found that supplementation with vitamin K1 or vitamin K2 improved bone mineral density, and a few studies showed a decreased risk of bone fractures. Some subsequent studies found that vitamin K supplementation had no effect on bone mineral density. Many of the studies conducted thus far are limited by flaws in the design or a small number of participants.