Evidence supporting the use of: Lime
For the health condition: Poison Ivy or Oak

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Synopsis

Source of validity: Traditional
Rating (out of 5): 1

Lime (commonly referring to calcium hydroxide or sometimes to the fruit, but typically the former in folk remedies) has been traditionally used in some cultures as a topical application for poison ivy or oak exposure. The idea is that lime's alkaline nature might neutralize the urushiol oil responsible for the rash, or dry out the blisters and soothe itching. However, there is no robust scientific evidence supporting the efficacy or safety of lime for this purpose. In fact, applying lime (calcium hydroxide) to the skin can itself cause irritation or chemical burns, potentially worsening the condition. The use of lime in this context is documented mainly in anecdotal reports and historical folk medicine, particularly in rural or resource-limited settings where commercial treatments are unavailable. Modern medical advice does not recommend lime for poison ivy or oak; instead, washing the affected area with soap and water, using topical corticosteroids, and other evidence-based treatments are preferred. The evidence supporting lime’s use is weak and largely rooted in tradition rather than rigorous scientific validation.

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Products containing Lime

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