Synopsis

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

The use of plants from the Asteraceae family (which includes species such as Echinacea, chamomile, and others) for treating or supporting recovery from colds has a long history in traditional medicine, particularly in Europe and North America. Echinacea, in particular, is one of the most commonly used herbal remedies for the common cold and is traditionally believed to possess antiviral and immune-boosting properties. Preparations made from roots or aerial parts of Echinacea species have been used by Native American tribes and later adopted in Western herbalism.

Scientific studies investigating the antiviral efficacy of Asteraceae plants, especially Echinacea, have yielded mixed results. Some in vitro and clinical studies suggest that certain extracts may reduce the duration or severity of cold symptoms, possibly through immunomodulatory effects rather than direct antiviral activity. However, systematic reviews and meta-analyses generally conclude that the evidence is inconsistent and of low to moderate quality, with significant variability in products, preparations, and study design. Other Asteraceae family members have less robust evidence for antiviral activity against cold viruses.

Overall, while there is substantial traditional use of Asteraceae plants for colds, particularly for Echinacea, scientific validation for broad antiviral efficacy remains limited and inconclusive. Thus, the practice is primarily justified by tradition, with moderate but not strong supporting evidence.

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