Evidence supporting the use of: Castor
For the body system: Lymphatics

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Synopsis

Source of validity: Traditional
Rating (out of 5): 2

Castor (Ricinus communis), particularly in the form of castor oil, has a long history of traditional use for supporting the lymphatic system. In folk medicine and naturopathy, castor oil packs—cloths soaked in castor oil and applied to the skin—are often recommended to promote lymphatic drainage, reduce swelling, and support detoxification. The rationale is that castor oil contains ricinoleic acid, which is thought to have anti-inflammatory and analgesic properties, potentially aiding lymphatic flow when absorbed through the skin. However, scientific evidence directly validating these claims is limited. A handful of small, preliminary studies and anecdotal reports suggest possible benefits of castor oil packs on lymphocyte count or reduction of localized swelling, but these findings are not robust or widely replicated. No large-scale, high-quality clinical trials have confirmed the efficacy of castor oil or castor oil packs for lymphatic support. Most recommendations for castor oil's lymphatic benefits stem from traditional practices rather than rigorous scientific validation. In summary, while castor is traditionally used for lymphatic support, the scientific evidence supporting its effectiveness is weak and largely anecdotal.

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