Castor oil is made from the beans (seeds) of the castor plant (Ricinus communis). Its taste is initially bland, then becomes bitter and unpleasant.
Castor oil has laxative and anti-inflammatory effects. It also might induce labor. It's sometimes flavored with cinnamon, peppermint, or other flavorings to mask its unpleasant taste.
People use castor oil for constipation, dry eye, childbirth, and to empty the colon before a colonoscopy. It is also used for osteoarthritis, rheumatoid arthritis, and many other conditions, but there is no good scientific evidence to support most of these uses.
The outer coat (hull) of the castor seed contains a deadly poison called ricin. The hull must be removed before use. Ricin has been tested as a chemical warfare agent. Weapons-grade ricin is purified and produced in particles that are so small they can be breathed in.
NatMed disclaims any responsibility related to medical consequences of using any medical product. Effort is made to ensure that the information contained in this monograph is accurate at the time it was published. Consumers and medical professionals who consult this monograph are cautioned that any medical or product related decision is the sole responsibility of the consumer and/or the health care professional. A legal License Agreement sets limitations on downloading, storing, or printing content from this Database. Except for any possible exceptions written into your License Agreement, no reproduction of this monograph or any content from this Database is permitted without written permission from the publisher. Unlawful to download, store, or distribute content from this site.
For the latest comprehensive data on this and every other natural medicine, health professionals should consult the Professional Version of NatMed. It is fully referenced and updated daily.
© Copyright 1995-2019. Therapeutic Research Center LLC, publishers of NatMed, Prescriber's Letter, and Pharmacist's Letter. All rights reserved.