Vitamin D3 is found in animal-sourced foods though most people do not get enough of this vitamin through diet alone. One serving contains 2000 IU of vitamin D3 (cholecalciferol) from the best possible source, molecularly distilled cold-water fish liver oil, delivered in a base of non-GMO safflower oil for maximum utilization. Delivered in easy-to-swallow softgels for maximum assimilation and nutrient absorption.