Frankincense

===Essential oil===
[[File:FrankinsenceEssOil.png|thumb|Frankincense (''Boswellia carteri'') [[essential oil]]]]
The [[essential oil]] of frankincense is produced by [[steam distillation]] of the tree resin. The oil's chemical components are 75% [[monoterpene]]s, [[sesquiterpene]]s, and [[ketone]]s. Contrary to some commercial claims, steam distilled frankincense oils do not contain the insufficiently volatile boswellic acids (triterpenoids), although they may be present in solvent extractions. The chemistry of the essential oil is mainly monoterpenes and sesquiterpenes, such as alpha-pinene, Limonene, alpha-Thujene, and beta-Pinene with small amounts of [[terpenoid|diterpenoid]] components being the upper limit in terms of molecular weight.<ref>{{cite journal | vauthors = Verghese J, Joy MT, Retamar JA, Malinskas GG, Catalan CA, Gros EG |year=1987 |title=A Fresh Look at the Constituents of Indian Olibanum Oil |journal=Flavour Fragr. J. |volume=2 |issue=3 |pages=99–102 |doi=10.1002/ffj.2730020304  }}</ref><ref>{{cite journal | vauthors = Hayashi S, Amemori H, Kameoka H, Hanafusa M, Furukawa K |year=1998 |title=Comparison of Volatile Compounds from Olibanum from Various Countries |journal=J. Essent. Oil Res. |volume=10 |pages=25–30 |doi=10.1080/10412905.1998.9700833}}</ref><ref>{{cite journal | vauthors = Basar S, Koch A, König WA | title = A verticillane-type diterpene from Boswellia carterii essential oil. | journal = Flavour and Fragrance Journal | date = September 2001 | volume = 16 | issue = 5 | pages = 315–8 | doi = 10.1002/ffj.992 }}</ref><ref>{{cite journal | vauthors = Frank A, Unger M | title = Analysis of frankincense from various Boswellia species with inhibitory activity on human drug metabolising cytochrome P450 enzymes using liquid chromatography mass spectrometry after automated on-line extraction | journal = Journal of Chromatography A | volume = 1112 | issue = 1–2 | pages = 255–62 | date = April 2006 | pmid = 16364338 | doi = 10.1016/j.chroma.2005.11.116 }}</ref>

Essential oils can be diluted and applied to skin or the fragrance can be inhaled.<ref>{{Cite web |title=Health Benefits of Frankincense Essential Oil |url=https://www.webmd.com/diet/health-benefits-frankincense-essential-oil |access-date=2022-11-15 |website=WebMD |language=en}}</ref>