What topics does this cannabis study cover?

This study covers research on: CBD, THC.

Where was this research published?

Published in Analytical and bioanalytical chemistry on August 18, 2026.

European CBD oils often mislabel contents and contain hidden risks

Q: What did this research study find?

**49% of products** assessed for declared *CBD* content did not contain the labeled amount, indicating widespread labeling inaccuracy.

Poorly labeled CBD and related cannabinoid oils marketed in Europe: a hidden risk for consumers? Insights from a long-term study.

Analytical and bioanalytical chemistry • August 18, 2026 • Highly Relevant

🤖

AI Summary

A decade-long analysis of 186 commercial oils sold in Europe found that CBD labeling was often inaccurate: 49% of products assessed for declared CBD content did not contain the stated amount. Chemical profiling also identified trans-Δ9-THC and less commonly monitored psychotropic isomers, including cis-Δ9-THC, Δ8-THC, and Δ10-THC. One product marketed as full-spectrum oil also contained HHC.

The findings raise concerns about unintended exposure to psychoactive cannabinoids and contaminants. When products were used according to their recommended dosage, 39% would exceed the acute reference dose of 1 µg/kg body weight for combined Δ9-THC and Δ8-THC intake established by EFSA. Polycyclic aromatic hydrocarbons were found in every sample, and 54% exceeded EU limits for oil-based food supplements—highlighting the importance of stronger quality control and more reliable testing before consumers purchase or use these products.

💡 Key Findings

49% of products assessed for declared CBD content did not contain the labeled amount, indicating widespread labeling inaccuracy.

High

90%

Several products contained potentially psychotropic THC isomers beyond trans-Δ9-THC, and HHC was detected in a product marketed as full-spectrum oil.

High

90%

At the recommended dosage, 39% of products would exceed EFSA’s acute reference dose of 1 µg/kg body weight for combined Δ9-THC and Δ8-THC exposure.

High

90%

Polycyclic aromatic hydrocarbons were detected in all analyzed samples, with 54% exceeding EU maximum limits for oil-based food supplements.

High

90%

📄 Original Abstract

UHPLC-HRMS analysis of 186 commercial cannabidiol (CBD) and related cannabinoid oils collected over the past decade revealed generally poor labeling accuracy. In total, 49% of products (86 of 181) did not contain the declared amount of CBD. Multivariate analysis of minor cannabinoid profiles enabled classification of the likely CBD source used in the formulations. In addition to trans-Δ9-tetrahydrocannabinol (trans-Δ9-THC), several samples contained other, less frequently monitored psychotropic THC isomers, including cis-Δ9-THC, Δ8-THC, and Δ10-THC. Moreover, hexahydrocannabinol (HHC) was detected in a product marketed as a full-spectrum oil. Considering the potential consumer risk associated with exposure to psychotropic cannabinoids, the acute reference dose (ARfD) of 1 µg/kg body weight, recently established by EFSA for the combined intake of Δ9- and Δ8-THC, would be exceeded in 39% (72 of 186) of cases when the products are consumed according to the recommended dosage. Another concern is the presence of polycyclic aromatic hydrocarbons (PAHs), which were detected in all analyzed samples, with 54% (101 of 186) exceeding the EU maximum limits for oil-based food supplements.

Paper Type

📄 Research

Publication

Journal: Analytical and bioanalytical chemistry
Published: August 18, 2026
PMID: 42611266
DOI: 10.1007/s00216-026-06734-5

Authors (8)

Zuzana Binova Department of Food Analysis and Nutrition, University of Chemistry and Technology Prague, Technicka 5, 166 28, Prague 6, Czech Republic.
Matej Maly Department of Food Analysis and Nutrition, University of Chemistry and Technology Prague, Technicka 5, 166 28, Prague 6, Czech Republic.
Lucie Drabova Department of Food Analysis and Nutrition, University of Chemistry and Technology Prague, Technicka 5, 166 28, Prague 6, Czech Republic.
Veronika Gomersall Department of Food Analysis and Nutrition, University of Chemistry and Technology Prague, Technicka 5, 166 28, Prague 6, Czech Republic.
Marie Zlechovcova Department of Food Analysis and Nutrition, University of Chemistry and Technology Prague, Technicka 5, 166 28, Prague 6, Czech Republic.
+3 more authors