CAOH® Power D3 softgels supply 1000 IU of vitamin D3 (Cholecalciferol). This important vitamin is in a highly-absorbable liquid soft-gel form. Vitamin D is normally obtained from the diet or produced by the skin from the ultraviolet energy of the sun. However, it is not readily abundant in food. As more people avoid sun exposure, Vitamin D supplementation becomes even more necessary to ensure your body receives an adequate supply.