People know castor oil as a stimulant laxative, meaning it can induce intestinal movement. This is the proven use of the said natural oil. It is an over-the-counter laxative which people wanting to lose weight have access to. This laxative can be habit-forming, though. Those using it can experience diarrhea but they can tolerate this as a long-term effect. Diarrhea can lead to electrolyte loss, so one could experience signs and symptoms of electrolyte imbalance, including weakness, inability to concentrate, abnormal heart rhythms, and dehydration.