Cannabizetol: New cannabinoid may have antioxidant and anti-inflammatory benefits for the skin

A recent study from the Università degli Studi di Milano, in Italy, published in the Journal of Natural Products, under the auspices of the American Chemical Society, reveals the discovery of a new cannabinoid called Cannabizethol (CBGD). This new compound, isolated from hemp extracts, represents a new addition to the cannabinoid family and shows potential in dermatological treatments.

Cannabizetol has a molecular structure that distinguishes it from other cannabinoids. This compound belongs to a very rare class of cannabinoid dimers, molecules formed by the fusion of two conventional cannabinoids. Furthermore, cannabizetol appears to exhibit remarkable antioxidant and anti-inflammatory activity in the skin, presenting itself as a potentially revolutionary component in dermatological and health care, due to its distinctive chemical composition and robust biological effects.

Discovery of cannabizethol in hemp

The study was developed by the Università degli Studi di Milano (Italy) in the Departments of Chemistry, Food, Environmental and Nutritional Sciences (DeFENS), and Pharmacological and Biomolecular Sciences "Rodolfo Paoletti", sponsored by LINNEA SA, based in Ticino (Switzerland). Lead authors include Luca Pozzi, Andrea Gotti, Francesca Annunziata, Giulia Martinelli, and Daniele Passarella, among others.

Italian and Swiss researchers separated cannabizetol during the analysis of hemp plant extracts. The identification of this previously unknown molecule was achieved through the application of advanced chemical techniques, which also allowed the confirmation of its structure.

The discovery of cannabizetol occurred through the creation of a standard laboratory sample through chemical synthesis. By comparing the synthetic compound with the natural extract, scientists were able to unequivocally confirm that the new molecule does indeed occur in the plant.

This methodology is frequently applied in natural product chemistry, as laboratory production of the compound guarantees the substance's presence in the natural material. In this case, the synthetic standard proved crucial in confirming that cannabizetol is not just a laboratory product, but rather a genuine metabolite of the plant.

Unique dimeric structure of cannabizethol

Cannabizetol's molecular structure is distinct, constituting a distinguishing feature. It is a dimeric cannabinoid with a methylene bridge, meaning it is composed of two cannabinoid units linked by a single carbon (methylene). Dimeric cannabinoids are extremely rare substances, with only a few having been identified to date.

Cannabizetol is only the third known compound belonging to this special class. Others known are cannabitwinol (CBDD), which is a dimer of CBD, and cannabisol, which is a dimer of THC. Imagine the following situation: taking two known cannabinoids, which are subjected to a process of union through chemical reactions, thus obtaining what is called a dimer. This complex architecture can give the new molecule properties substantially different from those of its "parent" cannabinoids.

In technical terms, dimers expand the chemical space of cannabis. The formation of new bonds between molecules enables entirely new effects not observed in single cannabinoids. Researchers even suggest that there may be other dimers yet to be discovered in the plant—perhaps combinations of two different cannabinoids—each with its own unique bioactivity.

Chemical structure of Delta9-Tetrahydrocannabinol (Δ9-THC), Cannabidiol (CBD), Cannabigerol (CBG) and Cannabichromene (CBC).

Chemical structure of Cannabisol, Cannabitwinol (CBDD) and Cannabizetol (CBGD).

Powerful antioxidant and anti-inflammatory effects

Initial tests with cannabizethol demonstrated exceptional biological activity. In laboratory experiments, the compound demonstrated very strong antioxidant properties. Additionally, cannabizethol demonstrated significant anti-inflammatory activity in skin tissue. When human skin cells were exposed to cannabizethol, a substantial reduction in the levels of several inflammatory genes was observed. In fact, cannabizethol proved more effective than cannabitwinol (CBDD)—the only other dimeric cannabinoid tested—in antioxidant and anti-inflammatory assays. As demonstrated by the study, cannabizethol's ability to quench oxidative stress and calm inflammation was "remarkable," and its impact on inflammatory signaling (including the NF-κB pathway) was significantly enhanced. In short, the new cannabinoid demonstrated, in the experiments performed, a highly potent cellular protective and anti-irritant effect.

Comparison with cannabitwinol and other cannabinoids

To put this into context, most known cannabinoids, such as CBD or THC, are monomers—single molecules. Dimeric cannabinoids, such as cannabizethol, are less prevalent, so comparing them is analogous to comparing a prototype with a standard model. As part of the experiments, the scientists directly compared cannabizethol with cannabitwinol (CBDD), a methylene-bridged cannabinoid previously isolated from hemp. Although they belong to the same "family" of compounds, cannabizethol demonstrated superior efficacy to cannabitwinol in antioxidant and anti-inflammatory tests. This observation suggests that the precise way in which two cannabinoids combine, and which cannabinoids they are, can have a significant impact. The discovery of other dimers, possibly with different combinations of THC and CBD, may offer additional therapeutic properties. Each new dimer represents a new point on the chemical map of cannabis, with potential new health benefits.

Potential cutaneous and therapeutic applications

Because cannabizetol has proven highly effective in reducing skin inflammation and oxidative stress, researchers highlight its potential for dermatological applications. Dermatological conditions such as acne, eczema, psoriasis, and general skin irritation involve inflammation and cellular damage. The existence of a natural molecule with the ability to simultaneously combat both problems is generating considerable interest.

Cannabizetol, due to its antioxidant and anti-inflammatory properties, could be incorporated into skin products or medicinal creams, with the aim of relieving redness, protecting skin cells and accelerating healing.

The study describes the compound as a "promising bioactive metabolite with potential dermatological applications." Clearly, more research is needed before cannabizetol can be used in products, as scientists will need to ensure its safety and efficacy in real-world formulations. However, this discovery points to an exciting new direction for cannabis-based therapies beyond the already known cannabinoids.

Continuous Flow Chemistry: Efficient Cannabizetl Production

Given the extremely low natural quantities of cannabizethol in the plant, producing sufficient material for detailed study posed a considerable challenge. To address this issue, researchers developed an advanced synthesis method using continuous flow chemistry. Flow chemistry involves circulating reactant solutions through narrow tubes or reactors, where continuous chemical reactions occur, rather than a single batch mixing. This technique provides substantially greater control over reaction conditions (temperature, mixing, time) and has the potential to significantly speed up processes.

The team applied flow chemistry to the steps connecting the two cannabinoid units. As a result, they were able to achieve a substantial reduction in reaction time compared to traditional batch methods. In practical terms, this evidence suggests that the production of cannabizethol (and related dimers) can be optimized in terms of speed and quantity. Efficient synthesis is crucial for future studies and the potential development of a commercial product, as relying solely on plant extraction would not be feasible. The success of this flow-based approach enables the scalable production of the compounds in question.

Implications for future cannabis research

The discovery of cannabizetol highlights a broader issue: the chemistry of cannabis remains largely unknown. With a vast array of over a hundred cannabinoids already identified, researchers have recently discovered the existence of even more complex molecules within the plant. Each newly identified compound increases the plant's medicinal potential. The study authors point to the likely existence of numerous unknown cannabinoids, which remain hidden within cannabis as analytical techniques evolve.

Dimeric cannabinoids, such as cannabizethol, offer the potential for substantially expanding possibilities. If two of the plant's compounds can combine to form a third, it's possible that different combinations—or even trimers and more—await discovery. This premise opens up a vast "chemical space" for exploration. Additionally, synthetic chemistry (including flux methods) makes it possible to create these molecules without the need for large quantities of plant material, further accelerating the research process. In short, the discovery of cannabizethol portends a promising future, with the possibility of discovering and studying dozens of other cannabis-derived molecules with unique structures and possibly new therapeutic effects in the coming years.

Cannabizetol is a remarkable example of how continued research into cannabis can yield surprising discoveries: a previously completely unknown compound may turn out to be a major new factor in skin health.

Featuring significant anti-inflammatory and antioxidant properties, as well as an efficient laboratory production method, CBD opens doors to the next generation of cannabinoids and highlights the potential of the cannabis plant for the discovery of new active ingredients.

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João Xabregas

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With a professional background in CAD technical drawing (2D and 3D), João Xabregas is an activist and advocate for all uses and applications of cannabis. He discovered and entered the world of cannabis during his youth, where he developed a special interest in the cultivation of the plant, which led him on a journey of self-learning through the world of cannabis that continues to this day. His adventures linked to cannabis cultivation began with the same goal as many others: to be able to guarantee the quality and eliminate any possible risks to his health of what he consumed, as well as to avoid any type of dependence on the illicit market. However, he quickly began to view the world of cannabis and everything related to it with a very different perspective. He admits the enormous passion he has for the most persecuted plant in the world and about which he is always willing to write and have a good conversation.

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