Cannabis and the Olympics: is THC a doping agent in 2026?

THC appears in the "substances prohibited in competition" category of the WADA code. That category applies only on competition days, not to earlier use unconnected with performance. In 2013, WADA raised the urinary detection threshold from 15 to 150 ng/mL, precisely so as to stop penalising old or passive use and to target consumption close to the event. For a substance to appear on the list, WADA must show that it meets at least two criteria out of three: a potential to improve performance, a health risk, or harm to the spirit of sport. THC remains classified there more on the last of these criteria than for any proven doping effect.

CBD follows the opposite trajectory. WADA excluded it from its list of prohibited substances with effect from 1 January 2018, recognising that it confers no competitive advantage and no psychoactive effect comparable to THC. An Olympic athlete may therefore consume CBD isolate with no anti-doping risk, provided the product contains no trace of THC.

A full-spectrum CBD product contains, by definition, traces of THC: up to 0.30 % in the finished product under the current French framework. That quantity is legal for sale, but it is not zero. Consumed regularly and in significant quantity, a full spectrum can, in rare cases, leave traces detectable during an anti-doping test.

For an athlete competing, CBD isolate or broad spectrum, without THC, is the more prudent choice. Our article on CBD for athletes and the anti-doping framework details the precautions to take ahead of a sporting deadline.

In June 2021, the American sprinter Sha'Carri Richardson was suspended for thirty days after testing positive for THC at the United States Olympic trials. She missed the 100 metres at the Tokyo Games, even though recreational cannabis was legal in the state where the test had taken place. This episode illustrates the logic of sport: the local legality of a substance never protects against a sporting sanction if that substance is on the WADA list on the day of the event.

In France, the French anti-doping agency (AFLD) applies the world anti-doping code in all competitions affiliated to a federation. An amateur licence holder taking part in an official event is therefore subject to the same rules as an Olympic athlete where THC is concerned. The legal threshold of 0.30 % THC in a French CBD product concerns only its being put on sale, not anti-doping detection, which depends on individual metabolism and frequency of consumption. Checking the product's certificate of analysis and knowing how long CBD stays in the body remains the best precaution before a competition.

Is CBD prohibited at the Olympic Games?

No. The World Anti-Doping Agency removed CBD from its list of prohibited substances on 1 January 2018. Only THC remains prohibited in competition.

Can you test positive for THC while consuming a CBD product that is legal in France?

Yes, if the product is full spectrum. The French legal threshold of 0.30 % concerns sale, not detection during an anti-doping test.

Does an amateur athlete risk an anti-doping test?

Yes, as soon as they take part in a competition affiliated to a federation applying the WADA code, through the tests carried out by the AFLD in France.

What is the difference between the legal threshold and the anti-doping threshold?

The legal threshold (0.30 % in the finished product) governs sale in France. The anti-doping threshold (150 ng/mL in urine) governs detection in the athlete: these are two independent measures.