Leaf extract of sage includes a range of powerful and active ingredients. These include a type of phenolic acid called rosmarinic acid, as well as tannic, ursolic and caffeic acids. Constituents also feature cineole, borneol and thujone. Together, these ingredients provide a powerful combination of benefits for skin care. In particular, sage is shown to have antibacterial, anti-inflammatory and antioxidant qualities. A little less dramatic, but still useful, effects include its use as a natural antiperspirant and insect repellent.