Synopsis

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

Lemongrass (Cymbopogon citratus) has a long history of use in traditional medicine systems, particularly in Asia, for the treatment and relief of cold symptoms, including congestion. In folk medicine, lemongrass is often prepared as a tea or inhaled as a steam to help ease nasal congestion, cough, and other symptoms associated with upper respiratory tract infections. Its use as a decongestant is likely due to its fragrant, volatile oils, such as citral, which can provide a sensation of clear breathing when inhaled.

However, the scientific evidence supporting its decongestant effects is limited. Some laboratory studies have shown that lemongrass possesses mild antimicrobial and anti-inflammatory properties, which could theoretically help reduce the severity or duration of cold symptoms. For example, in vitro studies indicate that lemongrass extracts have activity against certain bacteria and viruses, and animal studies suggest it may modulate inflammatory responses. Despite these findings, there are no well-conducted clinical trials demonstrating that lemongrass effectively relieves nasal congestion or shortens the duration of colds in humans.

Overall, while lemongrass is widely used in traditional medicine for cold symptoms and may offer mild symptomatic relief owing to its aroma and potential anti-inflammatory effects, current scientific evidence is insufficient to strongly recommend it as a decongestant. Its use is primarily justified by tradition rather than robust clinical validation.

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