Since 1947(Cholecalciferol)Maintains Healthy Bones & TeethSupports a Healthy Immune SystemNon-GMOGluten, Wheat & Dairy FreeDietary SupplementVitamin D is a fat-soluble vitamin that aids in calcium absorption, which helps to maintain healthy bones and teeth. Vitamin D also supports a healthy immune system. This product utilizes oil from select livers of deep-sea, cold-water fish. The oil has been purified to eliminate mercury and PCB's. This formulation is offered in oil-based softgels to promote optimal absorption and assimilation.