Synopsis

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

Guaco (most commonly referring to Mikania glomerata or Mikania guaco) has a long history of use in South American traditional medicine, especially in Brazil, for supporting the bronchial and respiratory systems. Traditionally, guaco has been prepared as teas, syrups, or tinctures and used to help relieve symptoms of coughs, bronchitis, asthma, and other respiratory ailments. The plant contains coumarin derivatives, which are believed to have mild bronchodilator, anti-inflammatory, and expectorant properties.

While there are some laboratory and animal studies suggesting that guaco may have bronchodilatory and anti-inflammatory effects, robust human clinical trials are lacking. Most of the evidence comes from ethnobotanical surveys and small-scale studies, rather than large, well-controlled clinical research. As such, its use is best characterized as being driven by tradition, with some preliminary scientific support but insufficient high-quality evidence to fully validate its efficacy for supporting the bronchial system.

In summary, guaco’s role in bronchial support is primarily justified by traditional use, particularly in South American herbal medicine, with a moderate rating of 2 due to limited but suggestive scientific investigation.

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