10-OH-HHC: Legal status, effects and risks in 2026

On May 29, 2024, the ANSM (French National Agency for Medicines and Health Products Safety) announced the classification of CBD derivatives then on the market (THCP, H4CBD, HHCPO…) on the list of narcotics. No sooner said than done, but immediately banned and immediately replaced.

Less than two weeks after the ban took effect, new CBD derivatives emerged circumventing the ban.

Today, we present one of them, 10-OH-HHC. You've heard of it: it's a cousin of HHC. You're probably wondering how it could possibly be legal? Or what are its characteristics?

Follow the guide as we continue our cannabinoid roadshow!

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Is 10-OH-HHC legal?

After its commercialization, 10-OH HHC became ubiquitous in CBD shops, but two years later it has become much rarer, although some shops continue to offer it. As of May 2026, it is still not explicitly prohibited in France and most EU countries . The ANSM decree of January 16, 2026, which strengthened the classification of HHC in Annex III, did not extend this classification to its metabolites such as 10-OH-HHC and 8-OH-HHC. The molecule therefore remains in a legal gray area: it is neither explicitly prohibited nor explicitly authorized. 10-OH-HHC is thus still in this gray area, legal because it has not been officially banned .

10 OH HHC: what is it?

10-OH-HHC is not exactly what you'd call a cannabinoid. It's a metabolite of HHC, like 8-OH-HHC, and is one of the possible results of HHC oxidation by the P450 cytochrome enzymes found in the liver.

In other words, it is one of the molecules created by the body after consuming HHC. In isolate form, it appears as a syrupy yellow liquid resembling honey.

A quick reminder about HHC

HHC, a relative of 10 OH HHC, was discovered in 1944 by Roger Adam. It is a hydrogenated form of THC, naturally present in minute quantities in cannabis.

In France, HHC paved the way for a market for CBD derivatives. It was legal for a time before being classified as a narcotic. Then an acetylated and hydrogenated form appeared: HHCPO . This also gained some notoriety before being banned.

The effects of 10 OH HHC

As yet, very little is known about the compound, as very little research has been done on it. Most of the information we have today comes from the two studies we cited above and from consumer reviews.

What we do know is that 10 OH HHC is not very stable. It has low bioavailability (a relatively small percentage of the product consumed is processed by the body) and a short half-life in the body. In other words, its action rapidly loses more than half its activity in the body.

According to available studies, this compound has a strong influence on CB1 and CB2 receptors. This would result in psychoactive activity quite similar to that of HHC, but with a shorter duration.

User feedback seems to confirm the results described in these studies. They describe sensations quite similar to hhc, namely:

• Altered perception (psychotropic effects)
• A feeling of relaxation and euphoria
• Appetite stimulation

They also report a faster and shorter duration of action than HHC.

The risks associated with consuming 10-oh-hhc

Regarding both risks and effects, it is difficult to make a definitive statement given the limited data available. Because this compound is naturally present in the body , some might assume it has a better safety profile than other compounds such as HHC or HHCPO.

But it should not be forgotten that, like all CBD derivatives, 10-OH-HHC has a psychoactive effect, whether natural or not, its consumption carries a degree of risk.

Several users have reported side effects very similar to those of THC, including:

• Increased heart rate
• Coordination problems
• Dry mouth
• Red eyes
• Reduced reactivity
• Short- and long-term memory loss
• Drug interactions
• Nausea or hunger
• Headaches
• Fatigue and drowsiness

Discovery, history and creation

The discovery of Hydroxy-hexahydrocannabinol (10-OH-HHC) , or 10-hydroxy hexahydrocannabinol, is relatively recent, dating back to 1980. It was made by the team led by Raphaël Méchouam at the Israel Institute for Biological Research. This initial discovery is one of only two known studies on this compound.

Having succeeded in synthesizing THC, the researchers went on to synthesize 10-oh-HHC and studied its effects on Rhesus monkeys. They demonstrated that the compound produced psychoactive effects as early as 0.5 mg/kg.

Although synthesized and studied in the 1980s, 10-OH-HHC was not fully isolated until 2015, by a group of researchers working at the University of Mississippi under the direction of Professor A. Ahmed. This research, aimed at testing the antimicrobial activity of hydrogenated HHC compounds, concluded that 10-OH-HHC had moderate antimicrobial activity, including methicillin-resistant Staphylococcus aureus, Leishmania donovani and various strains of Plasmodium falciparum.

To obtain 10-OH HHC, lab technicians must first create HHC by hydrogenating the product of CBD terpene coagulation. In simplified terms, this involves reacting a CBD molecule with a terpene to create THC . Next, the THC is hydrogenated to produce HHC . Finally, the HHC is oxidized by adding 10 groups of oxygen atoms bonded to hydrogen atoms, known as hydroxyl groups (OH). This is how 10-OH HHC is formed.

Conclusion

As we surmised at the conclusion of our article on the May 29, 2024 ban on CBD derivatives, this decision, which is supposed to protect the consumer, merely prolongs the cat-and-mouse game we're seeing in the CBD world.

Two years after its introduction, 10-OH-HHC has still not been classified in France. While some publications mistakenly present it as prohibited, the ANSM decree of January 16, 2026, demonstrates the opposite: it classifies HHC but does not classify its metabolites. This does not mean that the situation is permanent, and we will continue to monitor developments.

We hope you enjoyed this article and that it shed some light on this new compound. If so, feel free to check out our blog to learn more about the ever-evolving world of CBD!