Health
Cannabis resin now 25% more potent, global study reveals – The Guardian
Concentrations of intoxicating THC have risen, data from more than 80,000 street drug samples gathered over 50 years shows

Cannabis resin or hash has increased in strength by nearly 25% over the past half century, a major international study has revealed.
Researchers with the Addiction and Mental Health Group at the University of Bath analysed data from more than 80,000 cannabis street samples tested in the past 50 years in the US, UK, Netherlands, France, Denmark, Italy and New Zealand.
Their findings, published in the journal Addiction, reveal concentrations of THC the intoxicating component of cannabis responsible…
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