Researchers from the University of Pennsylvania, Veterans Affairs San Diego, RTI international, Americans for Safe Access, Palo Alto University, and Johns Hopkins University analyzed the content of 84 cannabidiol (CBD) products purchased on the internet and compared the results to their advertised concentrations. Products were mislabeled with 26% containing less CBD than labeled and 43% containing more, indicating a high degree of variability and poor standardization of online products.
Notably, the oil-based products were more likely to be accurate (45% compared to 25% for tincture and 12.5% for vaporization liquid) and had a smaller percentage of deviation. Oil based products also had a higher range of concentration. In addition to CBD mislabeling, ?-9-tetrahydrocannabibolic acid (THC) was detected in 21% of samples. This study also notes that products containing THC could have sufficient enough concentrations to produce intoxication in children.