In this video, Dr. Doug Lucas discusses Vitamin K, a crucial nutrient for both bone health and heart health. There are different forms of vitamin K, including K1 and K2, which are found in different sources. Vitamin K2, specifically MK7, has a longer half-life and is recommended for supplementation. It has been shown to improve bone mineral density and reduce coronary calcification. There is no evidence that vitamin K supplementation increases the risk of blood clots, except for individuals on the blood thinner warfarin. AlgaeCal Plus and AlgaeCal D3 Complete are recommended supplements that provide the necessary forms of vitamin K.