Castor beans come from the castor oil plant, scientifically known as Ricinus communis. These seeds are oval-shaped and can vary in color, often appearing mottled with shades of brown and gray. While they are known for producing castor oil, which has various industrial and medicinal uses, the seeds themselves contain a toxic compound called ricin. Due to the presence of ricin, castor beans are highly poisonous if ingested. Despite this toxicity, the oil extracted from the seeds is safe for use and is commonly found in cosmetics, lubricants, and even some food products. Proper processing is essential to ensure safety.