For vitamin D supplementation, vitamin D3 (cholecalciferol), which is the form of vitamin D naturally produced in the skin, is preferred to vitamin D2 (ergocalciferol).

• 对于维生素D补充剂，维生素D3(胆钙化醇)这种人体皮肤自然产生的形式优于维生素D2(麦角钙化醇)。