# Alpha-pinene

> Alpha-pinene is a bicyclic monoterpene with a sharp pine-resin aroma, the main terpene of conifer needles and a common, usually secondary, terpene in cannabis.

- Canonical: https://genetixbay.com/knowledge/glossary/alpha-pinene.html
- Also written: α-pinene, a-pinene, pinene, alpha pinene
- Glossary category: Cannabinoids and terpenes · Evidence: Established
- Status: Draft: awaiting expert review · Updated: 2026-10-31
- Licence: CC BY-SA 4.0 (https://creativecommons.org/licenses/by-sa/4.0/), attribute "GenetixBay cannabis glossary"

Alpha-pinene is the most widespread [terpene](https://genetixbay.com/knowledge/glossary/terpene.md) in nature, giving pine needles and turpentine their smell. It is a bicyclic [monoterpene](https://genetixbay.com/knowledge/glossary/monoterpene.md), an isomer of [beta-pinene](https://genetixbay.com/knowledge/glossary/beta-pinene.md), with the double bond in a different position. In cannabis it is usually present at modest levels and is rarely the single [dominant](https://genetixbay.com/knowledge/glossary/dominant.md) terpene, though some cultivars are notably pine-forward.

## In practice

Many COAs list "pinene" or show alpha- and beta-pinene separately; alpha is usually the larger of the two. Typical flower readings run 0.05-0.3% w/w. Like other monoterpenes it is volatile and lost during fast, warm drying. If a [lab reports](https://genetixbay.com/knowledge/glossary/coa.md) "total pinene", ask whether it's the sum of both isomers.

## Don't confuse with

- **Beta-pinene**: the isomer, with a more herbal, green note.
- **Pine-sol / pine-cleaner smells**: often a blend of compounds, not pinene alone.

## Myth check

Claims that pinene "counteracts short-term memory effects of [THC](https://genetixbay.com/knowledge/glossary/thc.md)" circulate widely. They rest on early lab and hypothesis papers, not established human trials; treat them as unproven. See [Mythbusters](https://genetixbay.com/knowledge/mythbusters.md).

## Related terms

[Beta-pinene](https://genetixbay.com/knowledge/glossary/beta-pinene.md), [Monoterpene](https://genetixbay.com/knowledge/glossary/monoterpene.md), [Terpene](https://genetixbay.com/knowledge/glossary/terpene.md), [Terpene profile](https://genetixbay.com/knowledge/glossary/terpene-profile.md), [Terpinolene](https://genetixbay.com/knowledge/glossary/terpinolene.md)

## Sources

1. Booth JK, Bohlmann J. 2019. Terpenes in Cannabis sativa: from plant genome to humans. Plant Science 284:67-72.
2. Ross SA, ElSohly MA. 1996. The volatile oil composition of fresh and air-dried buds of Cannabis sativa. Journal of Natural Products 59(1):49-51.