Vitamin D3 (cholecalciferol ... in the Journal of Clinical Endocrinology and Metabolism concluded that a 50,000-IU dose of vitamin D2 should be regarded as equivalent to a 5,000- to 15,000 ...

Vitamin D3, a form of vitamin D that we get from certain foods and exposure to sunlight, is an essential nutrient that plays a role in many bodily functions. This fat-soluble vitamin helps the ...

Vitamin D3, a form of vitamin D, promotes strong bones, good immune health, and mental well-being. You can get vitamin D3 from fortified foods, eggs, and fatty fish — or by spending time in the sun.