Vitamin D-3 from Healthy Origins® features 5,000 IU of vitamin D as cholecalciferol derived from lanolin in each softgel. Vitamin D is crucial for calcium absorption, skin and immune health. Also known as the Sunshine Vitamin, the body can make vitamin D upon exposure to sunlight, but factors such as more time spent indoors or living at more northern latitudes may decrease natural production. Supplemental vitamin D can support optimal levels in the body.