Dietary supplement made from Vitamin D. Vitamin D is necessary for the normal growth and development of your bones and contributes to the proper functioning of your immune system. It promotes the absorption of calcium in the bones and helps maintain normal levels of calcium in the blood. It has a positive impact on the immune system, the cell renewal process and supports stronger muscles and extra muscle strength. Vitamin D3 is up to ten times more effective than the commonly used D2 in part due to a stronger binding affinity to the vitamin D receptor. In addition, it dissolves in an olive oil fat matrix, which means even better absorption in the gut.