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THC: One Molecule, One Receptor, One Number

Still life with a Cibdol product introducing What Is THC? Tetrahydrocannabinol Explained
Cibdol · THC: One Molecule, One Receptor, One Number

Definition

Delta-9-tetrahydrocannabinol, THC for short, is the cannabis compound that Gaoni and Mechoulam isolated from hashish in 1964 [1]. Its main molecular target is CB1, a receptor whose structure was published in 1990 [2]. In the plant it starts one step earlier, as cannabigerolic acid [3].

The receptor does the work

Delta-9-tetrahydrocannabinol has one main molecular target, and that target has a name: CB1. Matsuda and colleagues published the structure of this cannabinoid receptor in 1990, along with functional expression of the cloned cDNA [2]. CB1 is not parked in one small corner of the body. Its distribution across the central nervous system is wide [2]. Start with the receptor, and everything else about this molecule falls into place.

THC is the short form. Delta-9-tetrahydrocannabinol is the full one, and it is the intoxicating compound of the plant, a trait that sets it apart from every other cannabinoid catalogued so far, as the 1964 work of Gaoni and Mechoulam first established when they isolated the active constituent of hashish [1]. Cibdol sells no THC products. Worth saying early, because what follows is chemistry and paperwork rather than a product pitch.

Centuries of use, no named molecule

Cannabis was not new in 1964. Centuries of use sit behind it, plus a long shelf of written accounts. What nobody had was the link between an effect and a specific named molecule [1]. Gaoni and Mechoulam closed that gap with three pieces of work in a single paper: isolation, structure, and partial synthesis [1].

The paper trail, year by year

YearPublished workWhat it pinned down
Before 1964Centuries of cannabis use, together with a long written record of itPlenty of description, but no effect attributed to a single named molecule [1]
1964Gaoni and Mechoulam: isolation, structure and partial synthesis of the active constituent of hashish [1]The intoxicating compound now had a structure, and part of it could be built in a laboratory [1]
1990Matsuda and colleagues: the structure of a cannabinoid receptor plus functional expression of the cloned cDNA [2]CB1 described as the main molecular target of THC, with wide distribution in the central nervous system [2]
After 1990Follow-up research on the body's own signalling compounds, anandamide and 2-AG [2]The receptor turned out to belong to an internal system, not only to a plant compound [2]
1998Fellermeier and Zenk: a hemp transferase prenylates olivetolate [3]Cannabigerolic acid named as the precursor of THC, one step upstream inside the plant [3]
Since thenThe largest published literature of any single cannabinoidTHC ranks as the most studied cannabinoid, and the least relevant one to Cibdol production

From olivetolate to two kinds of crop

StageWhat happens in the plantDocumented in
Starting materialOlivetolate, the substrate waiting to be modified1998, Fellermeier and Zenk [3]
The enzymeA transferase from hemp prenylates that substrate, attaching a prenyl group to it1998, Fellermeier and Zenk [3]
The productCannabigerolic acid, CBGA for short1998, Fellermeier and Zenk [3]
Why CBGA sits hereIt is the precursor of THC, so the molecule of this page begins life as a hemp acid1998, Fellermeier and Zenk [3]
The branch pointWhich route dominates after CBGA is decided by the genetics of the variety, not by anything added later in the fieldPlant genetics
The two outcomesDrug-type cannabis on one side of that split, industrial hemp on the otherPlant genetics
What it means for a cropSame starting acid, different dominant branch, different cannabinoid profile at harvestPlant genetics

What a batch certificate puts in writing

Line on the reportWhat it statesHow to read it
Measured THCA figure produced by analysis, present for every Cibdol productA measurement result, not a promise
Strongest oil in the range0.03%Printed because a laboratory measured it for that batch
THC products at CibdolNone in the catalogueThe figure documents a trace content, nothing more
CoverageEach Cibdol CBD product carries its own batch certificateThe paperwork follows the batch, not the brochure text
Scope of the numberCannabinoid content for that batchIt reports what is in the bottle, and stops there
Where to lookThe certificate for the batch, available before the seal is brokenSince 2014, one standard: know what is inside

Most studied, least relevant here

THC holds a clear rank in cannabinoid research. It is the most studied of the lot. It is also the compound with the least bearing on how Cibdol formulates and produces anything. Both things are true at once, which is exactly why a hemp company bothers to write a page about a molecule it does not sell. People ask. The chemistry is public. So here it is, in order.

The 1990 receptor paper set off something its authors could not have fully planned [2]. Once a cannabinoid receptor existed as a described protein, the next question was obvious: what does the body itself send to it. The research that followed named two internal signalling compounds, anandamide and 2-AG, along with the system they belong to [2].

A plant molecule that opened a human map

That is the strange shape of this timeline. A compound pulled out of hashish in 1964 [1] led to a receptor structure in 1990 [2], and the receptor led straight back to molecules the body makes on its own [2]. The plant arrived first in the laboratory. The system had been there the whole time. For hemp work, the trail stops one step earlier, at cannabigerolic acid [3].

Two questions with paper answers

Where the 0.03% comes from

From a measurement, not from a marketing decision. The strongest oil in our range carries a measured THC figure of 0.03%, and it appears in print because a laboratory produced that value. Genetics set the ceiling long before the analysis, since the route taken after cannabigerolic acid depends on the variety [3]. Industrial hemp sits on one side of that split, drug-type cannabis on the other [3]. A certificate reports the result of the crop and the process behind it.

Which report belongs to which bottle

Every Cibdol CBD product has its own batch certificate, and that certificate is tied to a batch rather than to a product name in general. So the number worth reading is the one attached to the item in your hand. One product, one report, one date on it. Check it before the bottle joins your routine. Working with cannabinoids since 2014 has taught us one thing above all others: claims are cheap, measured values are not.

Frequently Asked Questions

Why is THC singled out among cannabinoids?
Because it is the intoxicating one, a property no other compound described in the plant shares, and it was Gaoni and Mechoulam in 1964 who identified it as the active constituent of hashish through isolation, structure determination and partial synthesis [1].
Which enzyme step makes THC possible in hemp?
Fellermeier and Zenk showed in 1998 that a transferase from hemp prenylates olivetolate to give cannabigerolic acid, and that CBGA is the precursor of THC [3]. Which branch dominates after CBGA is a matter of plant genetics, splitting drug-type cannabis from industrial hemp.
What is CB1, in plain terms?
CB1 is the main molecular target of THC. Matsuda and colleagues published its structure in 1990, together with functional expression of the cloned cDNA, and described a wide distribution across the central nervous system [2]. Research after that paper named the body's own compounds, anandamide and 2-AG [2].
How do I find the THC figure for a Cibdol product?
Each Cibdol CBD product has its own batch certificate with a measured THC value on it. The strongest oil in the range shows 0.03%. There are no THC products in the catalogue, and the certificate reports a result rather than a promise.

About this article

Luke Sholl has been writing about cannabinoids, CBD, and the broader benefits of nature since 2011. His background includes first-hand cannabis cultivation experience spanning the full seed-to-harvest lifecycle across so

This wiki article was drafted with AI assistance and reviewed by Luke Sholl, CBD & wellness writer. Editorial oversight by Joshua Askew.

Editorial standardsAI use policy

Medical disclaimer. This content is for informational purposes only and does not constitute medical advice. Consult a qualified healthcare provider before use of any substance.

Last reviewed 26 серпня 2026 р.

References (3)

  1. [1]Gaoni, Y. and Mechoulam, R. (1964). Isolation, structure, and partial synthesis of an active constituent of hashish. DOI: https://doi.org/10.1021/ja01062a046
  2. [2]Matsuda, L.A. et al. (1990). Structure of a cannabinoid receptor and functional expression of the cloned cDNA. DOI: https://doi.org/10.1038/346561a0
  3. [3]Fellermeier, M. and Zenk, M.H. (1998). Prenylation of olivetolate by a hemp transferase yields cannabigerolic acid, the precursor of tetrahydrocannabinol. DOI: https://doi.org/10.1016/s0014-5793(98)00450-5

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