BIOMOLECULES AND ENZYMES

Detailed explanation-1: -Vitamin D supplements are available in two forms: vitamin D2 (“ergocalciferol” or pre-vitamin D) and vitamin D3 (“cholecalciferol”).

Detailed explanation-2: -Choosing the Best Vitamin D Supplement for Your Health If you choose to go the supplement route, Clifford recommends taking around 400 to 800 IU of vitamin D3 (cholecalciferol) per day. “Vitamin D3 is the form that is already stored in the body, so some studies have found it to be more effective, ” Clifford says.

Detailed explanation-3: -In foods and dietary supplements, vitamin D has two main forms, D2 (ergocalciferol) and D3 (cholecalciferol), that differ chemically only in their side-chain structures. Both forms are well absorbed in the small intestine.