When checking out facts about vitamins, it is important to be able to differentiate between what information is an actual fact, and what is simply a myth. Unfortunately, there are myths about just about everything, so any information learned on any topic should always be evaluated before deciding whether or not it is true. There are many myths about vitamins and supplements in circulation today. Some vitamins, such as vitamin D, have many myths attributed to their use. Others, such as vitamin A, do not have any at all.