Humulene

Humulene (α-humulene, also called α-caryophyllene) is a monocyclic sesquiterpene containing an 11-membered ring built from three isoprene units. It was first identified in hops (Humulus lupulus) and is the terpene primarily responsible for the earthy, woody aroma of beer. It is an isomer of β-caryophyllene, sharing the same molecular formula (C₁₅H₂₄) but with a different ring structure, and the two are frequently found together in plants.

Laboratory research suggests humulene has anti-inflammatory properties and, unusually for a cannabis terpene, may act as an appetite suppressant rather than a stimulant. This makes humulene-rich strains of interest to users who want to avoid the “munchies” effect. Studies have also explored its anti-tumor and antibacterial activities, though clinical evidence in humans remains limited.

Humulene also plays a role as a volatile organic compound in atmospheric chemistry, reacting rapidly with ozone. In cannabis, it contributes to the complex herbal, earthy notes that complement other terpenes in a strain’s aromatic profile.