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New research unveils cannabis’ hidden mental health pitfalls
The Mercury
|September 08, 2025
FEELING PARANOID?
FOR years, cannabis has been embraced as a stress reliever, a pain aid, and for some, even a wellness ritual. It's often described as “natural” and “safe”, especially compared to alcohol or harder drugs.
However, new research is questioning this belief. It has found a concerning connection between cannabis use, paranoia and mental health, especially for people who have experienced childhood trauma.
According to a large-scale survey conducted by the World Mental Health Survey Consortium, around 70% of adults report experiencing trauma at least once in their lives.
This trauma can stem from various devastating events, including witnessing a loved one's death, enduring physical violence, or surviving life-threat-ening situations. However, trauma is a subjective experience; what is traumatic for one person may not hold the same weight for another, depending on individual coping mechanisms and personal context.
Trauma, cannabis and paranoia
A large-scale study led by King’s College London and the University of Bath has put paranoia back in the spotlight.
Using data from more than 3 389 adults in the Cannabis & Me survey, scientists found a clear trend: people who used cannabis to self-medicate for anxiety, depression, or pain consumed significantly higher levels of THC (the main psychoactive compound in cannabis) and reported more intense paranoia than those who used it rec-reationally.
The results are concerning. Over half of the people surveyed, 52% reported childhood trauma, such as emotional abuse, physical violence, or family problems. These individuals had higher paranoia scores and were even more at risk when they used cannabis.
This story is from the September 08, 2025 edition of The Mercury.
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