Vitamin K2 MK-7 100mcg + D3 2000IU 50mcg is a unique vitamin formula consisting of natural vitamin K2, which has perfectly absorbable MK-7 from natto (fermented soybeans) and natural vitamin D3 obtained from lanolin, a component of sheep wool, so it is a vitamin produced in the same way as when human skin is exposed to sunlight. Vitamin K contributes to proper blood clotting and maintaining healthy bones. Vitamin D helps with the proper absorption and use of calcium and phosphorus, helps maintain proper blood calcium levels, and helps the immune system and muscles function properly.