Synopsis

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

Tea tree oil, derived from the leaves of Melaleuca alternifolia, has a long history of traditional use by indigenous Australians for various ailments, including respiratory issues. Traditionally, crushed leaves were inhaled to help relieve symptoms of coughs, colds, and sinus congestion. In modern aromatherapy, tea tree oil is sometimes used in steam inhalation or diffusers with the intention of supporting sinus health and easing breathing.

However, scientific evidence supporting the use of tea tree oil specifically for sinus support is limited. Some in vitro studies have demonstrated antimicrobial and anti-inflammatory properties, suggesting that tea tree oil could theoretically help address sinus infections caused by bacteria or fungi. There is also limited clinical research on its use in nasal sprays for chronic rhinosinusitis, with mixed results and concerns over irritation or allergic reactions.

Overall, while there is a strong tradition of tea tree oil use for respiratory and sinus complaints, robust scientific validation is lacking. Most available evidence is anecdotal or based on historical practice, rather than large-scale clinical trials. Therefore, tea tree oil’s use for supporting the sinuses is best described as traditional, with a moderate but not high level of supporting evidence.

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