Bright citrus aroma with mood-lifting, anti-anxiety, and antifungal properties.
Limonene is the second most abundant terpene in cannabis and the dominant terpene in citrus fruits. It produces the characteristic bright, uplifting citrus aroma associated with sativa-leaning strains. Research supports its anxiolytic, antidepressant, and immunomodulatory properties, making it one of the most therapeutically promising terpenes.
Aroma Profile
Primary Effects
Also Found In
Lemons, Oranges, Grapefruits, Limes
Limonene increases serotonin levels in the prefrontal cortex and hippocampus, producing antidepressant and anxiolytic effects similar to SSRIs but through a distinct mechanism.
Acts as an agonist at adenosine A2A receptors, contributing to its anti-inflammatory and immunomodulatory effects.
Disrupts fungal cell membrane integrity, demonstrating potent antifungal activity against Candida species and dermatophytes.
Induces apoptosis in cancer cell lines via mitochondrial pathway activation and caspase-3 upregulation in preclinical models.
Limonene is the primary "mood elevator" terpene. It counteracts the anxiety that high-THC strains can produce and enhances CBD's anxiolytic effects. Strains high in both limonene and CBD are consistently rated as the most anxiety-friendly.
Anxiety
Moderate EvidenceMultiple preclinical studies and one human pilot trial demonstrate anxiolytic effects. Modulates serotonin and dopamine signaling.
Condition guideDepression
Moderate EvidenceIncreases serotonin and dopamine levels in prefrontal cortex in animal models. Human data limited but promising.
Condition guideCancer (adjunct)
Preliminary EvidencePhase I clinical trial showed limonene reduced tumor marker CA 15-3 in breast cancer patients. Preclinical data shows apoptosis induction in multiple cancer cell lines.
Condition guideGERD / Acid Reflux
Moderate EvidenceOral d-limonene (1,000mg every other day) significantly reduced GERD symptoms in a double-blind RCT (n=19).
Condition guideAnxiolytic effects of limonene in human subjects
Inhaled limonene (1mg) significantly reduced anxiety scores on the STAI in healthy volunteers compared to placebo (p<0.05).
D-limonene for GERD: a double-blind trial
D-limonene 1,000mg every other day for 20 days produced complete relief in 89% of GERD patients vs. 33% placebo.
Limonene and breast cancer: Phase I clinical trial
Oral limonene reduced tumor marker CA 15-3 by 22% and showed favorable safety profile in 43 breast cancer patients.
Limonene modulates serotonergic and dopaminergic systems
Limonene increased prefrontal serotonin by 28% and dopamine by 19% in stressed rodents, with antidepressant effects comparable to fluoxetine at high doses.
Super Lemon Haze
Sativa
Lemon Skunk
Hybrid
Durban Poison
Sativa
Strawberry Banana
Hybrid
Cereal Milk
Hybrid
GRAS status. Skin sensitizer at high concentrations — avoid direct skin contact with concentrated limonene. Safe at cannabis concentrations.
All terpene information is for educational purposes only. Consult a healthcare provider before using cannabis therapeutically.