..well, you could refute ANYTHING if you did what these conference goers did. First sometimes they just talked about "Vit D" and in at least one occasion singled out D3 .... so, they aren't really talking about one thing. Also cite the "food additive" angle..well, we know the crappy Vitamin they put in milk is mostly D2 isn't it?? Facts are Dr's need people to get sick to get rich...they will always be telling you something isn't really good for you...just like when studies come out saying HFCS is OK!