Castor oil, derived from the seeds of the Ricinus communis plant, has a long history of use across cultures for a variety of health and cosmetic purposes. Research suggests that ricinoleic acid, its primary fatty acid component, may contribute to anti-inflammatory and analgesic effects, which has drawn interest for topical application related to joint discomfort and skin health. Studies indicate that oral use of castor oil can act as a stimulant laxative, with the FDA having recognized it for short-term constipation relief, though it should be used cautiously in this regard. Preliminary research and traditional use also point to potential benefits for wound healing and hair health, though more rigorous clinical studies are needed to fully understand its effectiveness across these various applications.
Compare this supplementResearch suggests that castor oil, and specifically its primary active component ricinoleic acid, possesses anti-infl...
View studies →Research suggests that castor oil and castor-oil-derived compounds show promise in wound healing contexts, primarily ...
View studies →The three studies linked here do not investigate castor oil or hair health in any capacity — they are observational a...
View studies →Research suggests that castor oil may offer some potential benefits for skin health, though the direct evidence base ...
View studies →These are commonly referenced dosage ranges for this supplement. They are not medical recommendations. Always consult a healthcare provider before supplementing.
| Form | Dose range | Frequency | Studied for | Source |
|---|---|---|---|---|
| Oil | 15–60 ml | As needed | Constipation relief (oral laxative use) | Common in clinical trials and pharmacopeial references for stimulant laxative effect |
| Topical | — | Daily | Hair health (scalp and hair application) | Traditional use; commonly used undiluted or diluted with carrier oils |
| Topical | — | As needed | Joint pain relief and anti-inflammatory use (castor oil pack applied to affected area) | Based on small RCTs evaluating castor oil packs for osteoarthritis and inflammation |
| Topical | — | Daily | Skin health and wound healing (applied directly to affected area) | Traditional use and observational studies; no standardized dose established |