The average THC percentage in France’s cannabis has risen rapidly in the past several years, according to new research.
The study was published in the journal Forensic Science International, and published online by the U.S. National Institute of Health.
The study’s abstract starts with some basic information for those unfamiliar with cannabis:
Cannabis contains a unique class of compounds known as the cannabinoids. Pharmacologically, the principal psychoactive constituent is Δ9-tetrahydrocannabinol (THC). The amount of THC in conjunction with selected additional cannabinoid compounds (cannabidiol/CBD and also cannabinol/CBN), determines the strength or potency of the cannabis product. Recently, reports have speculated over the change in the quality of cannabis products, from nearly a decade, specifically concerning the increase in cannabinoid content.
For the study, researchers examined the “analytical data of cannabis samples analyzed in the five French forensic police laboratories over 25 years.”
The increase potency of both herbal and resin cannabis in France “is proved through the monitoring of THC content.”
Cannabis resin now averages 23% THC; however, it averaged just 10% in 2009.
Herbal cannabis now has a THC percentage of 13; it averaged 7% in 2009 and just 2% in 1995.
Therefore, researchers state that; “The calculation of THC/CBD ratios in both herbal and resin samples confirms the recent change in chemotypes in favor of high potency categories.”
Click here for the full study.