Last updated on August 5, 2026 · Originally published February 8, 2019
Ahhhh…geraniol. The fragrant monoterpenoid, common to flowers such as roses and geraniums, has quickly become a personal favorite of mine, and for magnificently medicinal reasons. But before getting into that, it’s worth noting that geraniol is also found in a delightful array of other plants, including lemongrass, catnip, beebalm, citronella, Assam tea, grapes, and tobacco. Amazingly, geraniol has also been shown to be the active component in the Nasonov pheromone released by worker honeybees to re-orient the bees out foraging back to the hive. [1]
Geraniol’s aroma is soft, sweet and unmistakably rose-like, with a faint citrus edge underneath, and it is widely used in perfumery for exactly that reason. Chemically, it is an acyclic monoterpene alcohol, C₁₀H₁₈O, with a molecular weight of 154.25 g/mol and a normal boiling point of about 230°C.
Geraniol demonstrates antioxidant properties. [2] Researchers found that geraniol increased cell viability, that is, the cell’s ability to survive or live successfully, when using rat alveolar macrophages — a type of cell within the body that’s capable of surrounding and absorbing bacteria, thereby helping to clear our airways of infectious, toxic, or allergic particles. Geraniol also led to an increase in superoxide dismutase (SOD), an important enzyme that catalyzes the breakdown of the superoxide radical (O2–), thus making it an integral antioxidant. When the superoxide radical is not held in check, damage to our cells can result.
Geraniol has also been found to be a neuroprotectant. [3] When geraniol was given to mice in which Parkinson’s disease (PD) had been induced, the mice demonstrated improved motor coordination, and expression of biomolecules called neurotrophic factors (NTFs), which enrich the growth and survival potential of neurons. They are also involved in the formation of long-lasting memories. This study also demonstrated geraniol’s antioxidant activity. These attributes make it an attractive molecule for further study in treating or preventing neurodegenerative disorders like PD.
The list of important therapeutic applications of geraniol goes on. The work below is preclinical — cell lines and animal models, not people — but the breadth of it is striking. Researchers have found the terpenoid to possess antitumor or anticancer properties. [4, and references therein] These findings have been shown for skin, oral, breast, lung, colon, prostate, pancreatic, kidney, and liver cancers. It suppressed the growth of breast cancer tumor cells, while a specific type of healthy cell line was unaffected. [5] Lung tumor cells in mice were reduced in mass and volume when treated with geraniol. [6] Furthermore, the spread of cancerous cells in both the colon and the pancreas was decelerated. [7, 8] Geraniol was found to provide chemoprotective activity in both kidney [9] and liver [10] cancers. Chemoprotective agents protect healthy tissue from the toxic effects of anticancer medications. Additionally, geraniol has increased the effectiveness of chemotherapy drugs.
While the mechanisms by which geraniol inhibits tumor growth and survival might not be well-understood, yet, the fact that it has been studied with regards to so many different types of cancer make it a tremendously significant molecule for further study.
The result that arrived after this article was written
In 2025, a study tested four cannabis terpenes in mouse models of post-operative and fibromyalgia pain. Geraniol produced the strongest antinociceptive effect overall, with linalool and α-humulene next, and blocking the adenosine A2A receptor blocked the response. [11]
That points to a mechanism involving the adenosine A2A receptor rather than the cannabinoid receptors usually discussed in cannabis research, which is unusual and worth noting. It was also a mouse study using 200 mg/kg by intraperitoneal injection — a dose and route far removed from exposure through cannabis flower. But among the four terpenes tested head to head, geraniol came first.
How much is actually there
Cannabis cultivars known to contain geraniol include Lavender, Amnesia Haze, Headband, Great White Shark, and Death Star OG.
It is worth being clear that geraniol is usually a minor or trace constituent in cannabis flower and may not appear on a routine certificate of analysis at all. The therapeutic studies above tested isolated geraniol, not cannabis flower, generally at doses or concentrations far beyond exposure from flower. The chemistry is genuinely interesting; what it means for a jar on a shelf is a separate and much less settled question.
So, yeah, I guess it is love after all.
Updated August 5, 2026. Aroma and physical-property details have been added, along with research published since this article first appeared and a note on the concentrations at which geraniol occurs in cannabis. The original text is otherwise unchanged.
