Nutrition doomsayers often warn against taking vitamins, especially in large doses. Are megavitamins dangerous? The truth of the matter is that vitamins are in a class by themselves when it comes to safety. They are safe, even at large doses, so long as the warning signs of toxicity are heeded. Even the fat soluble vitamins, A and D offer treatment benefits that far outweigh the adverse effects of overdose. But isn’t that what doctors are for, to help patients use medicines safely and effectively. It is just common sense that megavitamins should be used under medical supervision. Unfortunately the medical profession is just now recovering from "malnutrition." It is not easy to find an experienced and knowledgeable nutrition-physician.