Vitamin D v/s VitaminD3 ADVERTISEMENT 469 viewsMay 17, 2011 0 Victoria May 17, 2011 0 Comments What are the differences between D3 and D. 2 Answers ActiveVotedNewestOldest 0 Katia0 Posted 0 Comments I believe that it is the same thing. When you see a reference to Vitamin D without any number, the reference is usually to vitamin D3. You are viewing 1 out of 2 answers, click here to view all answers. Register or Login