Glossary
CBGA (cannabigerolic acid)
Updated:
Cannabigerolic acid, or CBGA, is the first cannabinoid the hemp plant assembles and the branch point for the rest. Enzymes convert CBGA into CBDA, THCA or CBCA. Heat converts leftover CBGA into CBG. Labs report CBGA as its own line on a certificate of analysis.
Cannabinoid biosynthesis in hemp starts when geranyl pyrophosphate and olivetolic acid combine to form cannabigerolic acid. From there, three synthase enzymes compete for CBGA: CBDA synthase makes cannabidiolic acid, THCA synthase makes tetrahydrocannabinolic acid, and CBCA synthase makes cannabichromenic acid (Nachnani 2021). Which one wins is set by genetics, which is why hemp cultivars are bred for CBD dominance.
Most CBGA is consumed during flowering. What remains decarboxylates with heat to become neutral CBG, the same way CBDA becomes CBD (Molecules 2020). High-CBG cultivars carry mutations that slow the downstream enzymes, leaving more CBGA at harvest.
On a certificate of analysis, CBGA is listed separately from CBG. A raw or cold-processed extract may show meaningful CBGA, while a heated extract shows mostly CBG.
Reviews describe CBGA as non-intoxicating, with most activity data coming from cell and animal studies rather than human trials (Molecules 2024).
Sources
- The Pharmacological Case for Cannabigerol (J Pharmacol Exp Ther, 2021) PubMed (accessed 2026-10-13)
- (-)-Cannabidiolic Acid, a Still Overlooked Bioactive Compound: An Introductory Review and Preliminary Research (Molecules, 2020) PubMed (accessed 2026-10-13)
- Cannabigerol (CBG): A Comprehensive Review of Its Molecular Mechanisms and Therapeutic Potential (Molecules, 2024) PubMed (accessed 2026-10-13)