Lemon citronella oil, also known as Cymbopogon winterianus oil, is a popular essential oil derived from the leaves and stems of the lemon-scented citronella plant. This oil is often used for its pleasant, citrusy aroma and for its natural insect-repellent properties. Lemon citronella oil contains several active compounds, including citronellal, citronellol, and geraniol. These compounds are believed to be responsible for its insect-repellent properties, making it a popular natural alternative to chemical-based insect repellents. Aside from its insect-repellent properties, lemon citronella oil is also believed to have other health benefits. It is commonly used in aromatherapy to promote relaxation and reduce stress. It may also be useful in treating fungal infections and reducing inflammation.