Amatoxins are potent mycotoxins produced by certain species of fungi, most notably *Amanita phalloides*, the death cap mushroom. These toxic compounds are responsible for severe liver damage and can be fatal if ingested. Amatoxins are composed of α-amanitin and β-amanitin, which inhibit RNA polymerase II, leading to a cessation of protein synthesis in hepatocytes. The poisoning symptoms typically include nausea, vomiting, abdominal pain, and diarrhea initially, followed by a "pseudo-recovery" period before the onset of severe liver failure. Immediate medical intervention is critical for treatment, often involving supportive care such as hemodialysis and liver transplantation in severe cases. Prevention through education about poisonous mushrooms and early detection are key to managing this serious threat.