Synopsis

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

Rhizomes—specifically those from plants such as ginger (Zingiber officinale) and galangal (Alpinia officinarum)—have a long history of use in traditional medicine systems, such as Traditional Chinese Medicine (TCM) and Ayurveda, to treat symptoms of colds and respiratory infections. These traditions often cite the warming and expectorant properties of rhizomes, using them in decoctions, teas, or powders to relieve congestion, sore throat, and cough. The rationale in traditional systems is based on empirical observation and the energetic qualities assigned to these plants rather than on a modern understanding of viruses. Some laboratory studies have suggested that certain compounds in ginger rhizome (such as gingerols and shogaols) possess mild antiviral activity in vitro, as well as anti-inflammatory effects that may help alleviate symptoms. However, clinical evidence in humans is limited and mostly anecdotal or derived from small, low-quality studies. Therefore, while there is a strong traditional foundation for the use of rhizome for colds, robust scientific validation is lacking, and the overall quality of evidence is low. Rhizomes remain popular in home remedies and herbal formulations for colds, but their use should be considered primarily as a traditional practice with some suggestive, but not conclusive, scientific support.

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