Tea tree oil. (Ganai)
Bundjalung Aboriginal people from the coast of New South Wales crushed tea-tree (or paper bark) leaves and applied the paste to wounds as well as brewing it to a kind of tea for throat ailments. In the 1920s, scientific experiments proved that the tea-tree oil’s antiseptic potency was far stronger than the commonly used antiseptic of the time. Since then, the oil has been used to treat everything from fungal infections of the toenails to acne.