Optimum D3 is a comprehensive formula of not just vitamin D3, but also important supporting nutrients which help increase absorption, utilisation and activities of vitamin D. Vitamin D has rightfully became very popular as its benefits are becoming widely known, however single vitamin D supplements may not be the best way to take advantage of these benefits. Optimum D3 ensures you are getting the most from this important nutrient without having to buy a variety of supplements or take multiple tablets. Optimum D3 is a complex of cholecalciferol, the bio-active form of vitamin D, along with Vitamin K2, another important vitamin which works alongside D3 to ensure calcium is deposited in the bones and not the arteries! A high quality, chelated mineral complex consisting of Zinc, Manganese, boron & copper; these promote proper bone utilisation and immune health. To further increase effectiveness 1mg of Bioperine, a patented compound that increases absorption of nutrients, is included which helps make Optimum D3 one of the most effective D3 supplements available.