Cannabinoid science
Cannabinoid glossary: CBG, CBN, CBC, CBDV and THCV
CBD and THC are only two members of a much larger chemical family. This guide explains the terms appearing on UK labels, what the available evidence can support and why “minor” does not mean medically proven—or automatically legal.
What is a cannabinoid?
Cannabinoids are a family of chemical compounds. Phytocannabinoids are made by cannabis plants; endocannabinoids such as anandamide are made by the human body; synthetic cannabinoids are made in laboratories. Sharing a family name does not mean they have identical effects, safety profiles or legal status.
The plant commonly stores cannabinoids in acidic forms—such as CBDA, CBGA and THCA. Heat and time can remove carbon dioxide through decarboxylation, creating neutral CBD, CBG and THC. A laboratory may report the acidic and neutral forms separately, so readers should check the analyte names and units rather than compare headline numbers alone.
CBG
Cannabigerol
CBG is a plant cannabinoid formed mainly from CBGA after decarboxylation. CBGA is often called a precursor because plant enzymes can convert it into acidic forms including CBDA, THCA and CBCA. That does not make CBG a proven treatment, and a label should state an amount rather than relying on the word alone.
CBN
Cannabinol
CBN can appear as THC ages and oxidises. It is chemically distinct from CBD. In the UK, cannabinol and specified derivatives are controlled drugs, so it should not be treated as an automatically lawful wellness ingredient simply because it is described as a minor cannabinoid.
CBC
Cannabichromene
CBC is produced from CBCA after decarboxylation. It is usually present at lower concentrations than CBD in commercial hemp extracts. Human evidence is limited, so marketing claims should not run ahead of the laboratory result or the research.
CBDV
Cannabidivarin
CBDV is the propyl analogue of CBD: its side chain is shorter, which changes its chemistry. It is not simply a stronger or weaker CBD. Research into isolated CBDV cannot be transferred to an unverified consumer mixture.
THCV
Tetrahydrocannabivarin
THCV is the propyl analogue of THC and is not the same molecule as delta-9-THC. UK Home Office guidance identifies THC-V among controlled cannabinoids. A product name, hemp origin or trace quantity does not by itself establish legal status.
“Minor cannabinoid” describes quantity, not importance
The phrase generally means a cannabinoid found at a lower concentration than the dominant compounds in a plant or extract. It is not a regulatory category, a safety certificate or evidence of a particular benefit. Concentrations vary by cultivar, plant material and processing. Some compounds are difficult to quantify accurately without a validated analytical method and suitable reference standards.
Isolate, broad-spectrum and full-spectrum
Isolate
A highly purified single cannabinoid, commonly crystalline CBD. Purity still needs a specification and independent test.
Broad-spectrum
A multi-component extract processed to reduce or remove THC. The phrase does not state the test’s detection limit.
Full-spectrum
A wider plant extract that may retain several cannabinoids and terpenes. It can contain controlled cannabinoids, so composition and law still matter.
Terpenes are not cannabinoids. They are aromatic compounds found across many plants. A flavour name or terpene blend does not demonstrate a cannabinoid profile or therapeutic effect.
How to read the evidence
- Confirm that evidence concerns the same molecule, dose, formulation and route.
- Separate cell or animal research from controlled human studies.
- Do not transfer findings from a licensed medicine to an unrelated retail product.
- Check whether a claim describes a measured ingredient or merely a blend name.
- Match every certificate to the product and batch, then read its LOD and LOQ.
UK legal and safety context
Pure isolated CBD is not controlled in the UK, but THC, cannabinol and a number of related cannabinoids are controlled. Finished-product status depends on actual composition and the applicable law, not simply a “hemp”, “minor cannabinoid” or “THC-free” label. The Home Office also notes that isolating CBD without traces of controlled cannabinoids can be difficult.
The FSA’s precautionary advice for CBD in food is aimed at healthy adults and does not validate a medical claim or apply a dose to vaping. People taking medication, pregnant or breastfeeding people, children and people trying to conceive should seek appropriate professional advice.
Editorial boundary: this guide explains terminology and evidence. It does not recommend a cannabinoid for a symptom, diagnose a condition or provide legal advice.
Primary references
- UK Home Office: cannabis, CBD and other cannabinoids.
- Food Standards Agency: cannabidiol consumer guidance.
- NIH PubChem compound records for chemical names and structures.
Last checked 11 August 2026. Corrections can be sent with the page URL and a supporting source to affiliates@thcbdx.com.