Daily Vitamin D3 is cholecalciferol made from lanolin derived cholesterol from the wool of sheep. Vitamin D3 is the kind your body makes; which makes it more efficient in absorption. Vitamin D2 is not the kind the body makes. It's therefore less efficient and you use more. It's also cheaper usually. Each capsule provides 1000 IU of vitamin D3 . 100 Vcaps per bottle.