CBG, or cannabigerol, holds a special place in the cannabinoid family: it's from its acid form (CBGA) that the hemp plant builds all the other major cannabinoids — CBD, THC, CBC. That's why it's often called the « mother molecule ». Yet in mature flowers, its final concentration is generally very low — most CBGA having been converted into other cannabinoids before harvest. That paradox is precisely what makes CBG fascinating for researchers and high-end manufacturers.

Where CBG comes from

The whole biosynthesis of cannabinoids in the plant starts with a single precursor molecule: cannabigerolic acid (CBGA). From this CBGA, specific enzymes convert the molecule into CBDA, THCA or CBCA depending on plant genetics and growing conditions. During drying and decarboxylation (heating), the acid forms lose their carboxyl group and become CBD, THC or CBC.

Consequence: in a mature flower, almost all the initial CBGA has been converted. Only 0.1 to 1% CBG on average remains, sometimes less. That's why CBG long escaped attention — extremely hard to isolate in useful quantities.

To produce CBG concentrates, growers must harvest before complete enzymatic conversion, generally around mid-flowering. This early harvest sacrifices CBD or THC yield but yields material genuinely rich in CBG. Specific genetics have also been developed (so-called « CBG-dominant » lines) where enzymatic conversion is partly blocked.

What sets CBG apart

Molecularly, CBG (C₂₁H₃₂O₂) shares the cannabinoid backbone but stands out with a non-cyclic linear structure on some of its chains. This chemical difference translates into distinct interactions with the endocannabinoid system.

Like CBD, CBG is non-psychoactive at usual doses — no characteristic THC effect. On cannabinoid receptors, it interacts differently from CBD: preclinical research suggests it has a more pronounced affinity for certain CB1 and CB2 receptors, plus activity on other systems (serotonergic, adrenergic). These interactions are studied but their practical implications in humans remain to be clinically confirmed.

Why 2024-2026 mark a turning point for CBG

Three factors explain the recent interest. First, the development of CBG-dominant genetics in European cultivation has made truly enriched flowers and oils possible. Then, several serious scientific publications (notably in Cannabis and Cannabinoid Research) have characterised CBG's pharmacological profile more precisely than before 2020.

Finally, commercially, CBG has become a premium-tier marker. The molecule's natural rarity and the cost of specific genetics typically place it 50 to 100% above generic CBD per gram. A shop offering « CBG » at an entry price probably isn't offering real CBG — a useful consumer benchmark.

CBG, CBD: choose or combine?

For most uses, the question isn't « CBG or CBD » but rather « how can these two molecules complement each other ». Full spectrum flowers and oils naturally contain both in varying proportions, creating the entourage effect often invoked in the scientific literature.

If you want a product specifically CBG-oriented, check the ratio on the certificate of analysis. A « CBG-rich » product worthy of the name typically shows at least 5% CBG, sometimes more. Below that, it's often a standard CBD flower with a bit of residual CBG — labelled « CBG » for commercial purposes.

Legal status in France

CBG is legal in France under the general industrial hemp framework: THC strictly below 0.3%, plant from authorised varieties, no therapeutic claims. No specific decree has separately regulated CBG, unlike the bans on HHC (June 2023) and H4CBD (2024). The situation is stable as of writing.

CBG products (flowers, resins, oils) marketed in France respect this framework. Serious brands provide a certificate of analysis verifying both announced CBG content and THC compliance.

In what forms can you find CBG

• CBG flowers — from CBG-dominant genetics, often harvested earlier in the cycle. More earthy and woody aromatic profile than typical CBD flowers.
• CBG-dominant full spectrum oils — extracts where the CBG ratio is favoured. Precise dosing, practical format. Verify total announced concentration.
• CBG isolates — for very specific uses. Loses entourage effect of other molecules.

As with CBN, at Horus we recommend favouring flowers and full spectrum where CBG sits in its natural context — over isolates disconnected from the plant's other cannabinoids and terpenes.

Precautions and compliance

CBG, like other cannabinoids, isn't a medicine. No CBG product in France holds therapeutic marketing authorisation. Current formulations (flowers, oils, cosmetics) fall under existing industrial hemp frameworks.

If you're on treatment, talk to your doctor. Cannabinoids can interact with liver metabolism of certain drugs. The rule stays constant: on health questions, a professional's advice prevails over a retailer's. CBG is also not recommended for pregnant or breastfeeding women, or minors.

To explore other minor cannabinoids: CBN and its evening orientation, CBC and the entourage effect, THCV and the new wave. To understand strains: Permanent Marker.

Frequently asked questions

Why is CBG called the « mother molecule »?

Because its acid form, CBGA, is the common biosynthetic precursor of most other hemp cannabinoids. From CBGA, the plant builds CBDA (which becomes CBD on decarboxylation), THCA (which becomes THC) and CBCA (which becomes CBC). No CBGA, no other cannabinoids — hence the maternal analogy.

Is CBG psychoactive?

No, not at usual doses. Like CBD, it doesn't trigger THC's characteristic cognitive effects. That doesn't mean it's completely « inert » — it interacts with the endocannabinoid system — but its felt effects (when present) are clearly different from THC's.

Why is CBG more expensive than CBD?

Three reasons: the molecule's natural rarity in mature flowers, the cost of CBG-dominant genetics (more demanding), and the need for an early harvest that sacrifices part of total yield. A real CBG typically costs 50 to 100% more than its CBD equivalent. Be wary of entry prices: they often reflect a product not really CBG-enriched.

Can you mix CBG and CBD?

Yes, and that's even the most natural form. Most full spectrum products contain both in varying proportions. The mix isn't dangerous or unusual — quite the opposite, it matches what the plant naturally produces.

How do you check the quality of a CBG product?

Request the certificate of analysis. It must specify precisely the levels of CBG, CBD, THC and other cannabinoids. An honest product shows at least 5% CBG if it presents as « CBG-dominant ». Below, it's probably a standard CBD with residual CBG trace.