For decades, the relationship to vitamin D supplements in the world was not very serious. And most Canadians are in no hurry to change their attitude to it, since it is assumed that the only effect it - is prevention of child rickets, ie illness, debilitating bone. But we can say that the days of such disrespect numbered. If vitamin D is found to be the main cause of cancer and other serious diseases, it would be like burning of fuse bomb, which exploded a five-point lead to a fire at the medical front, Canada.