Ricin is a highly toxic protein that is extracted from the seeds of the castor bean plant, scientifically known as Ricinus communis. Even a small amount can be lethal if ingested, inhaled, or injected. Ricin works by inhibiting protein synthesis in cells, leading to cell death and potentially causing severe illness or death. Due to its toxicity, ricin has been studied for its potential use in bioweapons, but it is also a subject of research in cancer treatment. While there is no specific antidote for ricin poisoning, supportive medical care can improve the chances of survival if exposure occurs.