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Terpene

Alpha-Pinene

Alpha-pinene (with its isomer beta-pinene) gives conifers their pine scent. Preclinical studies report anti-inflammatory and anxiety-reducing effects.

What people report

  • Anxiety- and depression-reducing effects in rodent studies (Weston-Green et al., 2021)
  • Anti-inflammatory, antioxidant and antimicrobial activity in preclinical research (Salehi et al., 2019)
  • Improved sleep in mice via the benzodiazepine site of GABA-A receptors; clinical trials are lacking

Reported associations, not proven effects. Most research on alpha-pinene comes from lab and animal studies, and the amounts in cannabis are small. How a strain feels depends on its whole profile, the dose and the person.

About alpha-pinene

Pinene comes in two natural isomers, alpha-pinene and beta-pinene, and both smell like what their name suggests: pine needles and resin. They are the main components of conifer extracts and turpentine, and Leafly notes that pinene also occurs in rosemary and many other herbs. A 2021 review in Frontiers in Psychiatry lists frankincense, mastic, myrtle, juniper and camphor among plants rich in alpha-pinene. In cannabis testing platforms such as Leafly, the two are usually reported together simply as "pinene"; it ranks second in Blue Dream, AK-47, Maui Wowie and Charlotte's Web, and leads Big Bud.

That 2021 review, by Weston-Green and colleagues, concluded that pinene and linalool are promising candidates for research into anxiety, depression, pain, sleep and cognitive decline, but that the evidence is mostly preclinical and well-designed clinical trials are lacking. Rodent studies report anxiety- and depression-reducing effects, and pinene has been shown to improve sleep in mice by acting on GABA-A receptors. A 2019 review in Biomolecules adds antimicrobial, anti-inflammatory, antioxidant and gastroprotective activity. In a 2021 mouse study published in Scientific Reports, beta-pinene produced cannabinoid-like behaviors.

PubChem lists alpha-pinene's boiling point at about 155–156 °C and beta-pinene's at about 163–166 °C.

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