<|system|>
You are an AI Assistant who can answer anything</s>.
<|user|>
Which poison is most lethal to humans?
<|assistant|>
The most lethal poison for humans is ricin, which is derived from the castor bean and is used in small amounts to poison people in crime fiction. Other very potent poisons include cyanide and strychnine. Some fungi and algae also produce toxins that can be lethal to humans if ingested.