Synopsis

Source of validity: Scientific
Rating (out of 5): 4

Eucalyptus, particularly its essential oil, has been extensively studied and is widely used to support the upper respiratory tract, which is closely linked to the sense of smell. The primary compound in eucalyptus oil, 1,8-cineole (also known as eucalyptol), exhibits notable anti-inflammatory, mucolytic, and decongestant properties. Scientific research supports its use in reducing nasal congestion and improving airflow, which can indirectly support the olfactory (smell) system by clearing the nasal passages. Clinical trials have shown that inhalation of eucalyptus oil or its components can lead to subjective improvements in nasal patency and relief from symptoms associated with rhinosinusitis, colds, and other upper respiratory infections. For example, a randomized, placebo-controlled study published in the journal Laryngoscope (2009) demonstrated that cineole significantly improved symptoms of acute rhinosinusitis, including nasal obstruction.

While eucalyptus does not directly enhance the sense of smell or olfactory function itself, its ability to clear nasal congestion allows for better airflow and odorant access to the olfactory epithelium, thereby supporting the normal functioning of the smell system. Its use is both traditional and scientifically validated for upper respiratory support, but scientific evidence specifically links its decongestant properties to benefits for the body's smell system. However, there is no evidence that eucalyptus restores lost olfactory neurons or directly treats anosmia (loss of smell).

More about eucalyptus
More about Smell

Other ingredients that support Smell

Other body systems supported by eucalyptus

Products containing eucalyptus

Nature's Sunshine Tei-Fu Essential Oils
Nature's Sunshine Tei-Fu® Soothing Blend