Synopsis

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

Citron (Citrus medica) has a long history of use in traditional medicine, particularly in East Asian and Mediterranean cultures, for relieving cough and soothing the throat. In traditional Chinese medicine (TCM), citron peel ("xiang yuan") is included in remedies for coughs, especially those considered "dry" in nature, as it is thought to moisten the lungs and resolve phlegm. Classical texts and herbal compendia, such as the Compendium of Materia Medica (Bencao Gangmu), describe citron as having properties that benefit the respiratory system and alleviate symptoms like dry cough and throat irritation.

However, modern scientific research specifically validating citron’s efficacy for treating dry cough is limited. While some studies have explored the phytochemical content of citron, noting compounds such as limonene and flavonoids with potential anti-inflammatory and antioxidant effects, direct clinical evidence supporting its use for cough, especially dry cough, is lacking. Most contemporary references to citron for cough rely on traditional usage rather than controlled trials or mechanistic studies.

In summary, citron’s use for dry cough is grounded in traditional practices, particularly within Chinese and Mediterranean herbal medicine. There is insufficient scientific validation from clinical studies to robustly support its efficacy for this indication at present.

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