震撼***产品***D3

中文名称：***D3                                                                                                      英文名称：vitamin D3                                                                                                  其他名称：胆钙化[固]醇(cholecalciferol)                                                                                 定义：活性的7-脱氢胆固醇。由7-脱氢胆固醇经紫外线照射后生成。实际上它是一种***原，本身无活性，需先在***中代谢成25-羟胆钙化醇，再在***进一步羟基化后才有活性。