Marijuana is stronger now than it was in the 1960s
the verdict
SUPPORTED
the evidence backs this
confidence 83/100
Multiple studies and law enforcement seizure analyses confirm that the average potency of cannabis (THC concentration) has risen significantly over recent decades compared to historical baselines.
Evidence for · 3
A 10-year trend in cannabis potency (2013–2022) in different geographical regions of the United States of America
2024 · cited by 17
Studies analyzing DEA seizures over a 10-year period document ongoing increases in cannabis potency.
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More for · 2
Trends in Illicit Cannabis Potency based on the Analysis of Law Enforcement Seizures in the Southern Area of Rome
2023 · cited by 5
Law enforcement seizures in Rome demonstrate that average THC content in cannabis resin dramatically increased from 2015 to 2022.
Potency trends of cannabis in Jamaica during the period of 2014 to 2020.
2023 · cited by 1
Research in Jamaica shows a significant increase in median total THC levels and THC/CBD ratios from 2014 to 2020.