EFFECTS & LEGALITY OF THCA IN EUROPE

It all starts in the United States in 2018, with the passing of the Farm Bill, an agricultural reform that looked harmless but proved decisive for the hemp industry.

This law legally redefines the term hemp as any part of the cannabis plant containing less than 0.3% Δ9-THC. This simple threshold opened an unexpected legal door: since all the other forms of THC — acids, isomers, metabolites or derivatives — were not named in the law, they did not fall under the definition of prohibited cannabis.

From then on, thousands of American companies began selling so-called hemp-derived THC products: THCA-rich flowers, Δ8-THC cartridges, syrups and edibles labelled "< 0.3% Δ9-THC" but with effects identical to recreational cannabis.

This loophole, this gap in the law, sparked a real green rush: a parallel market, legal on paper but scientifically equivalent to traditional THC.

Some US states quickly tried to close the gap, while others chose to regulate or tax these new derivatives.

This logic, born across the Atlantic, then shaped the growth of the THCA market in Europe, where the 0.3% Δ9-THC threshold also plays a central role in hemp regulation.

In Europe, the debate around THC and THCA was not built on a "loophole" like the one in the United States, but largely around the principle of free movement of goods.

This principle was illustrated in 2020 by the Court of Justice of the European Union in its ruling known as Kanavape. The Court pointed out that a Member State must be able to justify a restriction by the aim of protecting public health, and must respect the principle of proportionality.

This decision has become a major reference in European litigation on hemp products and has deeply influenced the way Member States approach cannabinoids.

However, the rules that apply to THCA still depend on national law, the exact nature of the product and its lab analysis: they can therefore differ from one European country to another.

To understand what this means in practice for a consumer in France, you then need to look at the national classification of narcotics and the specific rules for products containing THCA.

France tells the different cannabinoid substances apart through its narcotics regulations and the rules that apply to hemp products.

For THCA, it is therefore essential to distinguish the molecule in its acid form from Δ9-THC, while checking the actual composition of the finished product and its compliance with the rules in force when it is sold.

Classifications can change, and some cannabinoids have been the subject of successive regulatory updates. Lab testing of the batch therefore remains essential.

The applicable rules also depend on the product category, how it is presented, its origin and the jurisdiction where it is sold.

That is why it is better to reason from the actual product and its lab analysis rather than from a simple "THCA" sales label.