What Is THCV? THCV, CBG and CBN in Your Cannabis Label's Small Print, Decoded

Last checked: October 30, 2026

Every legal pack in Canada has to print two cannabinoid numbers. Some packs print more. That's where the alphabet soup starts: THCV, CBG, CBN, sitting in smaller type and leaving readers to guess. If you've ever spotted THCV in that small print and wondered what is THCV, good instinct. Here's the reference sheet, built from federal law, Health Canada guidance and the CFIA's botany file.

For adults 19+. Fair warning, it's a vocabulary lesson, not a shopping list: no products, no rankings, and no claims about what any cannabinoid does in your body. The law doesn't make those claims on a label, and neither do we.

First, the two numbers the law demands

Health Canada says there are more than 100 known cannabinoids, and THC and CBD are the two most common. Those two are the only ones the Cannabis Regulations force onto the front of the pack, as "Total THC" and "Total CBD."

One definition matters here. In the Regulations, "THC" means delta-9-tetrahydrocannabinol, full stop. So the Total THC line is a delta-9 number. A minor cannabinoid only shows up on a label if the maker chooses to list it.

What is THCV?

THCV is short for tetrahydrocannabivarin. The CFIA's biology document on Cannabis sativa notes that THC-type cannabinoids have been identified with carbon side chains anywhere from one to five carbons long. THCV is the three-carbon (propyl) member of that family; PubChem's chemical name for it literally includes "3-propyl". Chemistry-wise, it's a cousin of THC, not THC itself.

Three legal points worth knowing:

1. It's cannabis under the law. Schedule 1 of the Cannabis Act covers phytocannabinoids from the plant, and item 3 covers any substance identical to one of them "regardless of how the substance was obtained." Lab-made or plant-made, the same rulebook applies.
2. Health Canada names it. Its guidance on cannabinoids other than delta-9-THC lists THCV and CBN among the compounds it wants licensed processors to handle under the same controls as THC.
3. Those controls are specific. When a product is made to contain them, Health Canada recommends that they count toward the THC ceiling together with delta-9-THC, and that the label give each one's name and amount alongside the standardized THC symbol.

Health Canada's own math example: an edible with 2 mg of CBN plus 8 mg of delta-9-THC fits inside the 10 mg ceiling. With 3 mg of CBN plus 8 mg of delta-9-THC, it doesn't. The guidance also notes it isn't aimed at the small amounts that occur naturally in the plant or form during processing and storage.

What is CBG?

CBG stands for cannabigerol. In the CFIA's account of how the plant builds its chemistry, CBG is the first cannabinoid made in the synthesis pathway. It's the precursor of the acid forms of THC, CBD and CBC. The CFIA adds that CBG normally appears at relatively low concentrations because most of it gets converted further down the line.

Historical footnote: one of the papers the CFIA cites is a 1964 study by Gaoni and Mechoulam that described cannabigerol as "a new hashish constituent."

CBG is not on Health Canada's list of cannabinoids it wants treated like THC. It's still cannabis under the Act.

What is CBN?

CBN stands for cannabinol. The CFIA describes it as an oxidation artifact of THC. Translation: it's a breakdown product, something THC can turn into as it oxidizes over time. CBN is on Health Canada's list, so the same recommended counting and labelling rules apply when a product is made to contain it.

Where minor cannabinoids sit on a pack

Health Canada's packaging and labelling guide treats "other cannabinoid content" as optional label information. Optional doesn't mean unregulated:

• It can't be false or misleading. That's the baseline for anything printed on the label.
• It stays in smaller type. Optional details go in regular sans serif type, no larger than the mandatory information.
• Recommended for anything THC-like. The guide recommends labelling the name and quantity of other cannabinoids that Health Canada treats like THC.
• Off the label, too. Cannabinoid amounts can also go on a package insert, and a QR code can link to a certificate of analysis.

Quick answers

Is THCV legal in Canada? It's cannabis under the Act, so it's legal only through the legal cannabis system and only for adults.

Does "Total THC" include THCV? Not by definition. The regulatory THC is delta-9. That's exactly why Health Canada asks makers to name THCV separately.

Is a bigger minor-cannabinoid number "better"? A label number is a measurement, not a grade. Read it as data.

Bring the label questions to Jane St

Jane Finch Cannabis is at 2728 Jane St, North York, near Jane St & Sheppard Ave W. Adults 19+ only. Bring government-issued photo ID, bring the pack, and ask staff to walk the label with you line by line. Now you know what those three little letters mean. Want more basics first? Start with our Cannabis 101 guide.