The castor oil is obtained from seeds of the castor or Ricinus communis. The oil has a transparent to yellowish colour and is viscous. Castor oil is non-toxic and contains no toxic ricin, which is found in the seeds. Since antiquity, it has been used in Egypt in the medical field. It was also used as a fuel for oil lamps. Likewise, in ancient Greece the use as an internal and external cure was customary.

The castor oil is obtained from seeds of the castor or Ricinus communis. The oil has a transparent to yellowish colour and is viscous. Castor oil is non-toxic and contains no toxic ricin, which is found in the seeds.