Synopsis

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

Luo Han Guo (Siraitia grosvenorii), also known as monk fruit, has a long history of use in Traditional Chinese Medicine (TCM) for soothing sore throats, coughs, and for supporting respiratory health, especially during colds and flu. In TCM, Luo Han Guo is believed to "clear heat" and "moisten the lungs," properties associated with relieving symptoms of upper respiratory tract infections. Its sweet, cooling nature has led to its inclusion in many traditional herbal teas and remedies aimed at reducing throat irritation and coughs, which are common symptoms during colds.

Despite its well-documented traditional use, scientific evidence supporting Luo Han Guo's effectiveness in preventing or treating colds is limited. Most modern research on Luo Han Guo focuses on its mogrosides—natural sweet compounds with antioxidant and anti-inflammatory properties. Some in vitro and animal studies suggest potential anti-inflammatory and antimicrobial effects, but these findings have not been directly linked to clinical outcomes in cold prevention or treatment in humans. No high-quality clinical trials have specifically evaluated Luo Han Guo for preventing or treating the common cold. Therefore, its use for this purpose is justified mainly by tradition rather than robust scientific evidence.

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