Pinene

What is pinene?

Pinene is a monoterpene, a small ten-carbon aroma molecule. It comes in two natural forms, alpha-pinene and beta-pinene. Both have a tight four-carbon ring in their structure.

In cannabis, pinene is made in the trichomes, the tiny resin glands on the flower. Alpha-pinene is counted among the plant's major monoterpenes, and researchers who sort cannabis by terpene profile count pinene-led plants as a group of their own.

Pinene is also the main ingredient in turpentine, the solvent made from pine resin, and chemists use it as a starting material for making other compounds, including myrcene.

What does pinene smell like?

Pinene smells like pine: sharp, fresh and resinous, like a Christmas tree or a handful of crushed needles. In a strain it adds a clean, woody, slightly herbal note.

Where is pinene found besides cannabis?

Pinene is one of the most common terpenes in the plant world. Familiar sources:

• Pine and other conifers: the main aroma compound in many conifer extracts.
• Rosemary: a big part of its woody, piney smell.
• Basil: one of several herbs that carry it.
• Citrus peel: present in orange and lemon peel oils.

Does pinene change how a strain feels?

Research on whether terpenes change how cannabis feels is early and mixed. The "entourage effect", the idea that terpenes and cannabinoids work together, is still being tested, and a 2024 review of the research found it remains unproven.

You'll find plenty of claims online about what pinene does, and claims are not the same as evidence. Personal reports about pinene-heavy strains are interesting, but they aren't proof.

Pinene vs Myrcene

These two are linked more closely than their smells suggest. Industry actually makes Myrcene by heating beta-pinene, so one is a starting point for the other. In the jar, though, they're easy to tell apart. Pinene is sharp, clean and piney, while myrcene is earthy, musky and hop-like, with a touch of ripe fruit. Myrcene is one of the most common terpenes in cannabis and often leads a strain's profile. When pinene leads, the strain tends to smell like a forest.

Finding pinene on a label

Some producers list the top terpenes on the package, and others put them in a certificate of analysis for the batch. Pinene may appear as alpha-pinene, beta-pinene or both, so check for either name.

Terpene levels change with the grower, growing conditions and the batch, so the lab numbers for your product are a better guide than the strain name or the smell alone.