Vitamin D3 25ug(1000iu) 500%. Vitamin D3 (Cholecalciferol), Di Calcium Phosphate, Magnesium Stearate, Silicon Dioxide, Microcrystalline Celllulose. (Cholecalciferol). PROELITE Vitamin D3 tablets are a specific, high-strength form of vitamin D, which promotes normal bone health and contributes to the maintenance of healthy immune function, as well as playing a role in cell division.