Ricin is a highly toxic protein that is derived 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. Ricin is not a weapon of mass destruction but can be used in targeted attacks. It is classified as a biological toxin and is regulated under various laws due to its potential for misuse. Despite its dangers, ricin has also been studied for potential medical applications, including cancer treatment.