Synopsis

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

Terpenoids, a large and diverse class of naturally occurring organic chemicals derived from terpenes, have been used in traditional medicine systems for centuries to treat symptoms of colds and other respiratory ailments. Several plants rich in terpenoids, such as eucalyptus, thyme, and tea tree, have been incorporated into folk remedies as inhalants, teas, or topical applications purported to relieve congestion, cough, and other cold-related symptoms. The rationale in traditional use often stems from the aromatic nature of terpenoids, which are thought to help clear nasal passages and provide soothing effects.

Scientific studies on specific terpenoids (for example, menthol, eucalyptol, or thymol) do suggest some biological activities, including mild antiviral, anti-inflammatory, and expectorant effects. However, the evidence is typically limited to in vitro (test tube) experiments or animal studies, and robust clinical trials in humans are scarce. Furthermore, the term "terpenoid (unspecified)" is too broad, as biological activity varies widely among the hundreds of different terpenoid compounds. As such, while certain terpenoids have shown some promise individually, there is insufficient high-quality evidence to support the clinical use of unspecified terpenoids as antiviral agents for colds. Overall, their use for this indication is rooted primarily in tradition, with some limited scientific support for certain compounds within the class.

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Other ingredients used for Colds (antiviral)

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Products containing Terpenoid (unspecified)