Tea tree essential oil is obtained by water steam distillation of the leaves of Melaleuca alternifolia. This is a shrub native to Australia, which in recent years has grown in popularity due to its properties. The presence of terpinene-4-ol stands out in its composition, with a minimum percentage of 35% and γ-terpinene. However, the composition of the tea tree is a much more complex mixture of mono and sesquiterpene alcohols. Tea tree essential oil is currently considered one of the most beneficial oils in aromatherapy.