The major constituent in eucalyptus leaves is a volatile oil known as eucalyptol (1,8-cineol). In order to provide an effective expectorant and antiseptic action, the leaf oil should contain approximately 70-85% eucalyptol. Eucalyptus oil is said to function in a fashion similar to that of menthol by acting on receptors in the nasal mucosa, leading to a reduction in symptoms such as nasal congestion. In test tube studies, eucalyptus species have been shown to possess antibacterial actions against such organisms as bacillus subtilis, as well as several strains of streptococcus.* * These statements have not been evaluated by the FDA. This is not intended to diagnose, treat, cure or prevent any diseases. 10 ml bottle