Castor oil has been used for centuries as a multipurpose remedy, and modern research supports several of its traditional uses—especially for constipation and as a skin and hair emollient. It is not a cure‑all, but when used correctly it can be a comforting, low‑cost addition to everyday wellness routines.
What castor oil is
Castor oil is a thick, pale oil pressed from the seeds of the castor bean plant (Ricinus communis). Its main fatty acid is ricinoleic acid, which has unique laxative and anti‑inflammatory properties. Drug references classify castor oil as a stimulant laxative when taken orally, and as an occlusive, moisturizing oil when applied to skin.
Evidence‑based benefits
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Relief of occasional constipation: Oral castor oil stimulates intestinal motility and fluid secretion, leading to a bowel movement within 2–6 hours; medical guidelines only recommend it short‑term and at measured doses.
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Skin softening and barrier support: As a thick emollient, castor oil helps seal in moisture and can improve dry, cracked areas like heels, cuticles, and rough patches when used topically.
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Mild anti‑inflammatory effect on skin: Lab and small clinical studies suggest ricinoleic acid has anti‑inflammatory and antimicrobial activity, which may help calm irritated skin when diluted with other oils.
Many popular uses—such as boosting hair growth, shrinking cysts, or “detoxifying” organs—are based mostly on tradition and anecdotes rather than robust clinical trials.
Safe ways to use castor oil at home
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