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What are the main toxins found in death cap mushrooms?

Death cap mushrooms contain several types of mycotoxins: amatoxins, phallotoxins, and virotoxins, which affect the production of DNA in humans and other animals. The toxins cannot be destroyed by boiling, cooking, freezing, or drying the mushrooms. A single mushroom may contain many times over the amount of toxin that would prove fatal; ingesting only a small piece is enough to kill an adult.