Evidence supporting the use of: Rosemary
For the health condition: Congestion (sinus)

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Synopsis

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

Rosemary (Rosmarinus officinalis) has a long history of use in traditional medicine for respiratory conditions, including congestion and sinus issues. In folk remedies, rosemary was frequently prepared as an herbal steam or inhalation, capitalizing on its aromatic essential oils, particularly cineole (eucalyptol), camphor, and borneol, which are believed to have decongestant and antimicrobial properties. Historical texts from Mediterranean and Middle Eastern traditions describe rosemary being used to help "clear the head," alleviate catarrh, and ease breathing during colds.

Modern scientific evidence supporting rosemary specifically for sinus congestion is limited. Some small studies and laboratory research indicate that compounds in rosemary essential oil—most notably 1,8-cineole—may help reduce inflammation and act as mild bronchodilators. Inhalation of rosemary vapor can have a subjective decongestant effect, possibly by stimulating sensory nerves and increasing nasal airflow. However, rigorous clinical trials in humans for sinus congestion are lacking. As a result, rosemary's use for this purpose is primarily justified by tradition and anecdotal reports rather than strong scientific validation. Nonetheless, its pleasant aroma and mild antimicrobial effects have maintained its popularity in steam inhalations and aromatherapy blends for supporting respiratory comfort.

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