How much antifreeze do you need to ingest to kill a 100 pound person?

Ingesting as little as 2 to 10 ounces of antifreeze (ethylene glycol) can be lethal to a 100-pound person, depending on individual factors such as age, health, and tolerance. Symptoms of poisoning can begin to appear after ingestion of just a small amount, and the substance is highly toxic, affecting the kidneys and central nervous system. Immediate medical attention is crucial in cases of suspected ingestion.