Guaiol
Woody, balsamic — the earthy base note
Terpene
What is guaiol?
Guaiol is a sesquiterpene alcohol named for guaiacum, the tropical tree whose resin has been prized for centuries in traditional medicine. It also shows up in cypress, patchouli, and ginger. Its aroma is soft and woody — balsamic and slightly sweet, with a hint of resin.
Effects
Like most sesquiterpenes, guaiol is sturdier than the volatile monoterpenes, so it survives higher temperatures and lingers in cured flower. Research highlights anti-inflammatory and antimicrobial activity, and it has a long history of topical use in herbal remedies. In a strain's profile it adds a grounding, earthy base rather than a bright top note.
Research note
Most of guaiol's evidence is preclinical, so treat specific claims accordingly — but there's real science behind it. A 2024 study found guaiol shifted macrophages toward the anti-inflammatory M2 phenotype and activated PPAR-γ signaling, connecting its traditional anti-inflammatory reputation to a specific molecular pathway. For a mellow, woody character in flower, it's a terpene worth recognizing on a COA.
Conditions that cite this compound
These condition guides point here — they cover the same compound from the patient side.