Typically refers to the oils and dried leaves of the eucalyptus tree, which are commonly used in food and in traditional medicine. Eucalyptus is said to fight infection, improve energy, and regulate blood sugar.

While there is not much scientific research addressing these claims, eucalyptus is a popular ingredient in sexual health supplements. It has a pleasant flavor and aroma, and it is completely safe in small amounts. However, in large amounts, it can cause potentially serious side effects including nausea and vomiting. People with liver conditions should check with their physicians before using supplements with eucalyptus.