D3 Drops with K2 provides 1000iu of vitamin D3, the preferred form of vitamin D, per 3 drops, together with 45µg of vitamin K2. Vitamin D contributes to numerous biological functions in the body, including: - normal function of the immune system - maintenance of normal muscle function - maintenance of normal bones, as well as normal utilisation of calcium and phosphorous - vitamin D also has a role in the process of cell division Vitamin D3 (cholecalciferol) is the preferred form of supplemental vitamin D as this is the form produced by the skin in response to sun exposure. Vitamin K is needed for the maintenance of normal bones. D3 Drops with K2 provides vitamin K2 as MK-7, a highly effective form of K2. D3 Drops with K2 is a pleasant tasting liquid formula which allows flexible dosing.