不是。VD2與 VD3 supplement ，VD提取的來源不同。。

Vitamin D3 is only found in animal-sourced foods, whereas D2 mainly comes from plant sources and fortified foods。

Vitamin D3 (cholecalciferol)；  Vitamin D2 (ergocalciferol)

更多比較見鏈接。。https://www.healthline.com/nutrition/vitamin-d2-vs-d3#TOC_TITLE_HDR_3