Is D2 or D3 Best?
 

Vitamins

Is D2 or D3 Best?

by Becky Holman

Vitamin D2 is the synthetic form produced by irradiating yeast, while D3 is the natural form found in cod liver oil. In a recent study researchers divided a brood of chicks into three groups: no vitamin D, vitamin D2, vitamin D3. Of those receiving no vitamin D, 60 percent died; of those getting the synthetic D2, 50 percent died; of those getting the natural D3, all lived. If you’re getting your vitamin D from fortified foods, be sure it’s D3, and if you use D supplements, be sure it’s the natural form for best results.