Caryophyllene

What is caryophyllene?

Caryophyllene (also called beta-caryophyllene, or BCP) is a sesquiterpene, a slightly larger and heavier terpene than the ten-carbon monoterpenes like myrcene or limonene. Its structure includes a small four-carbon ring, which is rare in nature.

In cannabis it's the most common sesquiterpene, and it often sits near the top of the terpene results for popular strains. One more odd fact: a related compound, caryophyllene oxide, is the smell drug-detection dogs are trained to pick up when searching for cannabis.

Caryophyllene is also unusual because, in lab studies, it binds to one of the body's cannabinoid receptors, called CB2. That's a finding about the molecule itself, not evidence about what a strain will do.

What does caryophyllene smell like?

Caryophyllene smells peppery, spicy and woody, with an earthy side. Think cracked black pepper or a whole clove. In a strain, it often adds a warm, spicy edge under sweeter or fruitier notes.

Where is caryophyllene found besides cannabis?

Caryophyllene is in many spices and herbs, and it's approved as a food flavouring in the United States. Common sources:

• Black pepper: a big part of the spicy aroma.
• Cloves: part of the warm, spicy smell of the whole spice and its oil.
• Cinnamon: found in the spice and its oil.
• Hops: present alongside its close cousin humulene.
• Basil, oregano and rosemary: everyday kitchen herbs that carry it too.

Does caryophyllene change how a strain feels?

The honest answer is that we don't know yet. 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.

The CB2 lab finding gets a lot of attention online, but a lab result about a single molecule doesn't tell you how a whole strain will feel. People's reports about caryophyllene-heavy strains are interesting, but they aren't proof.

Caryophyllene vs Humulene

These two are close relatives. Humulene is an isomer of caryophyllene, built from the same atoms arranged differently, and it was once even called alpha-caryophyllene. The two usually show up together in the same plants. Humulene is named after hops and is a big part of the earthy, woody, "hoppy" smell in beer, while caryophyllene leans more peppery and spicy. If you see one on a terpene report, there's a good chance the other is nearby.

Finding caryophyllene on a label

Some producers print the top terpenes on the package, and others list them in a certificate of analysis for the batch. That's the most reliable way to know whether a product is high in caryophyllene.

Leafly names strains such as Gelato, Bubba Kush and Sour Diesel as often high in caryophyllene. Still, terpene levels shift from grower to grower and batch to batch, so check the numbers on your product rather than going by name alone.