Last updated: October 2026
CBGA (cannabigerolic acid) is the “parent” cannabinoid in hemp and cannabis: the plant turns it into the acid forms of THC, CBD and CBC. Heat converts CBGA into CBG. CBGA isn’t intoxicating. Research on its benefits is limited to lab and animal studies, so claims about CBGA benefits in people aren’t supported yet.
Below: how CBGA fits into the plant, CBGA vs CBG vs CBD, what the research shows (including the COVID headlines), UK status, and buying CBGA.
What is CBGA?
Living hemp plants don’t make CBD or THC directly. They make cannabinoid acids, starting with CBGA. Plant enzymes convert CBGA into THCA, CBDA or CBCA, depending on the variety. When the plant material is heated or dried (decarboxylation), these acids lose a chemical group and become THC, CBD, CBC, and CBGA itself becomes CBG. Weighing up which to buy? Our guide to the best CBD oil you can buy in the UK compares the main options. That’s why CBGA is called the “mother” cannabinoid. See how CBD is extracted and our guide to cannabinoids.
Our pick
CBD Oil Broad Spectrum
Broad Spectrum CBD Oil is just broad spectrum CBD and coconut MCT oil, in 500mg, 1,000mg or 2,000mg. Half a pipette is 0.35ml; about 0.2ml on the 500mg (0.1ml on the 1,000mg) gives 10mg.
Add Broad Spectrum CBD Oil 500mg to bag or choose another strength
Broad spectrum with 0% THC, every batch third-party lab tested, made in the UK. For adults only. We don’t recommend our products during pregnancy or breastfeeding. Free UK delivery over £40.
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View productCBGA vs CBG vs CBD
| CBGA | CBG | CBD | |
|---|---|---|---|
| What it is | Raw acid form, the starting point | Heated form of CBGA | Heated form of CBDA |
| Intoxicating? | No | No | No |
| Human research | None of note | Very limited | Most studied |
| Stability | Breaks down with heat and time | Stable | Stable |
See CBG vs CBD and what is CBC?
CBGA benefits: what the research shows
- COVID headlines: a 2022 lab study found CBGA and CBDA blocked the coronavirus spike protein from entering cells in a dish. It wasn’t tested in people, and no one should use CBGA to prevent or treat COVID.
- Brain and inflammation: 2026 reviews of acidic cannabinoids describe effects in cells and animals, and stress the gap before human use.
- Other claims about CBGA for diabetes, heart health or seizures come from early lab or animal work.
In short, CBGA is scientifically interesting but unproven in people.
UK status and buying CBGA
CBGA isn’t named as a controlled cannabinoid in Home Office guidance, but any food supplement containing it would need novel food authorisation and must not contain THC or other controlled cannabinoids. CBGA products are rare in the UK. If you see one, check for a batch lab report and whether the brand is on the FSA public list. For an established, legal option, see broad spectrum CBD.
Related guides
- UK CBD law explained.
- For another minor cannabinoid explained in plain English, see our CBDV (cannabidivarin) guide.
- Whether minor cannabinoids add anything together is the question behind the entourage effect: is it real?
- For another minor cannabinoid, and why it is controlled in the UK, see THCV (tetrahydrocannabivarin) explained.
The FSA’s 10mg a day figure for CBD is precautionary advice rather than a legal limit, set while longer-term safety research continues. At Evopure we think it is a very cautious figure, and many adults use more. If you go above it, increase slowly, and check with your GP or pharmacist first if you take any medication.
Sources 3
- van Breemen RB et al. Cannabinoids block cellular entry of SARS-CoV-2 and the emerging variants. J Nat Prod, 2022.
- Acidic cannabinoids in brain disorders: neurobiological mechanisms, preclinical evidence, and translational challenges. Neurosci Biobehav Rev, 2026.
- Home Office. Drug licensing factsheet: cannabis, CBD and other cannabinoids.
