Synopsis

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

Rosemary (Rosmarinus officinalis) has a long history of use in traditional herbal medicine for a variety of ailments, including respiratory conditions such as colds, especially those accompanied by fever. In European folk medicine, rosemary was often infused as a tea or used in steam inhalation to help clear congestion, reduce fever, and promote sweating, which were thought to aid in recovery from colds and flu. The herb’s aromatic essential oils, particularly eucalyptol (1,8-cineole), camphor, and borneol, are believed to have mild antiseptic and anti-inflammatory effects, supporting its traditional use for respiratory relief.

However, the scientific evidence for rosemary’s effectiveness specifically in treating colds with fever is limited. Some in vitro and animal studies suggest that rosemary has antimicrobial, anti-inflammatory, and mild antipyretic (fever-reducing) properties, but robust clinical trials in humans are lacking. Its traditional use is likely based on its overall stimulating, aromatic qualities and ability to promote sweating, rather than direct antiviral or fever-reducing actions. In summary, rosemary’s use for colds with fever is rooted in traditional practice, with modest supporting evidence from laboratory studies but insufficient data from human clinical trials to substantiate its efficacy.

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