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THC potency

This shows the outline of an inflamed teen head with leaves surrounding it.

·February 20, 2026·8 min read

Teen Cannabis Use Doubles Psychosis and Bipolar Risk

One hit could have a two-year countdown. New research confirms that teen cannabis use doubles the risk of severe psychiatric disorders in young adulthood.

Featured Neuroscience Open Neuroscience Articles Psychology

·January 2, 2019·4 min read

Increased Risk of Harm From Cannabis Across Europe

A new study reveals the potency of THC in both herbal cannabis and cannabis resin has increased significantly in Europe since 2006.

Featured Neuroscience Psychology

·December 17, 2018·3 min read

Higher Average Potency Cannabis Increases Risk for First Disorder Symptom

Since 1993, THC potency in cannabis has increased from 3.5% to 12.3%. Researchers report those who first used cannabis in the early 90s had a 1.88% increased risk of developing cannabis use disorder, while those who started on higher potency THC marijuana are at a 4.85% increased risk.