what is vitamin d3 made from
The recommended form of vitamin D is vitamin D3 or cholecalciferol. This is the natural form of vitamin D that your body makes from sunlight. Supplements are made from the fat of lambs' wool.However, a clinical study reported in 2008 suggested that vitamin D2 works as well as vitamin D3.Many supplements contain vitamin D as vitamin D2 or calciferol.It's derived from irradiated fungus. Because this is not the form of vitamin D naturally made by your body, WebMD nutritionist Kathleen M. Zelman, MPH, RD, recommends using the D3 form for those taking vitamin D supplements.Because of its potency, different forms of vitamin D are used in prescription medications.t's derived from irradiated fungus. Because this is not the form of vitamin D naturally made by your body, WebMD nutritionist Kathleen M. Zelman, MPH, RD, recommends using the D3 form for those taking vitamin D supplements. Because of its potency, different forms of vitamin D are used in prescription medications.