"There is also some folks on this site who use an argument from analogy and claim that Accutane(retinoic acid) in high doses cures\" acne, therefore vitamin or other similar vitamins may do the same.accutane is the same as vitamin a , and since this is a form of megavitamin therapy used by the medical industry,means that megavitamin therapy is safe and healthy, which it is not." . . . .