terpenes

Cannabis Terpenes Explained: Aroma, COAs & the Science

Terpenes — not indica vs. sativa labels — are what actually determine your cannabis experience. Learn the 10 most important cannabis terpenes, their effects, aromas, and how to use them to choose the right strain for your goals.

By DCWeedHub Editorial · Published · Updated

Cannabis Terpenes Explained: Aroma, Labels and What the Science Supports

Short answer: Terpenes are aromatic compounds made by cannabis and many other plants. They give a product much of its smell and flavor. Claims that a particular terpene produces a particular effect in people go well beyond what clinical research has shown, so this guide covers what terpenes are and how to read them. It doesn't make effect claims.

What terpenes are

Cannabis makes terpenes in the same resin glands, called trichomes, that make cannabinoids like THC and CBD (Russo 2011, Br J Pharmacol). The same compounds give familiar smells to other plants: limonene to citrus peel, pinene to pine, linalool to lavender, and caryophyllene to black pepper.

Common cannabis terpenes by aroma

Terpene Typical aroma Also found in
Myrcene Earthy, musky, herbal Hops, lemongrass
Limonene Citrus Citrus peel
Beta-caryophyllene Peppery, spicy, woody Black pepper, cloves
Linalool Floral, lavender Lavender
Alpha- and beta-pinene Pine Pine, rosemary
Humulene Woody, hoppy Hops
Terpinolene Herbal, floral, piney Various herbs and conifers
Ocimene Sweet, herbal Mint, basil

Sources: Russo 2011. Aroma descriptions are general and vary by product.

One well-documented finding: beta-caryophyllene binds to the CB2 cannabinoid receptor in lab studies (Gertsch et al. 2008, PNAS). That's a finding about receptors in the lab, not evidence of any effect from a product you buy.

The "entourage effect" is a hypothesis

The entourage effect is the idea that terpenes and cannabinoids act together to shape a product's effects. It was laid out as a hypothesis in a 2011 review (Russo 2011) and the review itself frames it as synergy "if proven." It hasn't been established in controlled human trials. Treat marketing that promises a specific feeling from a terpene profile with caution.

Indica, sativa and what labels actually tell you

A 2022 study of commercial cannabis in the U.S. found that "indica" and "sativa" labels didn't consistently match the products' chemical makeup (Smith et al. 2022, PLoS ONE). A lab report is a more reliable record of what's in a product than the label or the strain name. More in Indica, sativa and hybrid: the real story.

How to find terpenes in DC

Licensed products in DC are lab-tested. A Certificate of Analysis (COA) lists cannabinoids and, when tested, terpenes. Not every COA includes a terpene panel. Learn to read one in how to read a cannabis COA, and confirm a store is licensed with how to check if a DC dispensary is licensed.

To buy in DC, register first: start your ABCA registration. Then browse the licensed dispensary directory.

Frequently asked questions

Do terpenes get you high? Terpenes aren't the intoxicating compound in cannabis. THC is (NASEM 2017).

Does heat affect terpenes? Terpenes are volatile, so heat and storage can reduce them. How much depends on the product and conditions.

Do terpenes change how cannabis affects you?

That's not established. The "entourage effect" is a hypothesis that hasn't been shown in clinical trials (Russo 2011).

Does DC require terpene testing?

DC law lists required tests for potency and contaminants. Terpenes aren't among them, so not every COA includes them (D.C. Code § 7-1671.05).

Is beta-caryophyllene a cannabinoid?

In lab studies it binds the CB2 receptor (Gertsch et al. 2008). That doesn't show an effect in people.

Sources

Educational information only, not medical advice. 21+.