Determination of Δ 9 -tetrahydrocannabinol, 11-nor-carboxy-Δ 9 -tetrahydrocannabinol and cannabidiol in human plasma and urine after a commercial cannabidiol oil product intake.

-THC in both urine and plasma samples raises questions and concerns for the proper interpretation of toxicological results, especially considering Greece's zero tolerance law applied in DUID and workplace cases.