Vitamin D3, or cholecalciferol, is a very effective form of vitamin D for improving blood levels. Nearly every cell in the body contains receptors for vitamin D. It is a key regulatory hormone for calcium and bone metabolism. Adequate vitamin D status is essential for ensuring normal calcium absorption and maintenance of healthy plasma calcium levels. In addition to its key nutritional role in supporting healthy bones, new evidence suggests it may also have a prominent role in cellular cardiovascular, colon and immune health. These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure or prevent any disease.