About Eucalyptus globulus oil (cineole)
Eucalyptus oil's principal active is 1,8-cineole (eucalyptol). Standardized enteric cineole has RCT support for acute rhinosinusitis and bronchitis, but generic 'eucalyptus oil' is not standardized to a cineole dose, so scoring is uncertain. Undiluted oil is toxic if swallowed in quantity; keep to formulated doses.
What Eucalyptus globulus oil (cineole) supports
- Cineole content may aid sinus/airway symptoms - RCTs used standardized cineole, not generic oil
How much Eucalyptus globulus oil (cineole) to take
The RDA prevents deficiency. The effective range is what clinical trials used to actually move the outcome.
Effective
200–600
mg
Standardized enteric cineole trials (e.g. sinusitis/bronchitis) used ~200 mg three times daily.
Clinical evidence
Limited clinical evidence. Evidence is for standardized cineole, not generic eucalyptus oil.
NIH Fact Sheet