Eucalyptus leaves are a great source of antioxidants, particularly flavonoids, which protect your body from oxidative stress and free radical damage. Eucalyptus is high in flavonoids, which are antioxidants that may lower your risk of certain cancers, heart disease, and dementia. Eucalyptus contains a compound called eucalyptol, which has been found to decrease nasal congestion, cough frequency, and cold-related headaches. It may also improve asthma symptoms. Eucalyptus contains many anti-inflammatory compounds, such as cineole and limonene, which may act as pain relievers.
Eucalyptus oil is associated with decreased blood pressure and anxiety. It’s believed to activate the parasympathetic nervous system, which promotes relaxation.