New research suggests that vitamins D3 and K2 may support immune system function by supporting healthy cell growth.* D3/K2 Liquid supports bone health, calcium balance, and cardiovascular function.* Vitamin D is a fat-soluble vitamin that is essential for maintaining normal calcium metabolism.* Vitamin D3 (cholecalciferol) can be synthesized by humans in the skin upon exposure to ultraviolet-B (UVB) radiation from sunlight, or it can be obtained from the diet. Our vitamin K2 formula includes the soy-free, clinically tested MenaQ7® working primarily outside of the liver in bones and blood vessels.