Citrus aurantium, commonly known as bitter orange, is a fruit-bearing tree native to Southeast Asia. It produces small, round, orange fruits that are typically too sour and bitter to eat raw. The tree is also valued for its fragrant flowers, which are used to produce neroli oil, a popular essential oil in perfumes and aromatherapy. Bitter orange has been used in traditional medicine for various purposes, including digestive issues and appetite suppression. Its peel contains compounds like synephrine, which is often found in dietary supplements aimed at weight loss. However, caution is advised, as it may interact with certain medications.