Cannabis Users' brain function under the microscope: new study targets genetic links
NCT ID NCT04373525
First seen Mar 30, 2026 · Last updated Jun 22, 2026 · Updated 18 times
Summary
This completed study from the University of Hong Kong followed 110 cannabis users aged 16–60 to see how their thinking skills change over time. Researchers tested memory, attention, and other brain functions, and also analyzed blood samples for genetic markers. The goal was to understand long-term effects of cannabis on the brain and whether certain genes make some users more vulnerable, especially in Chinese populations.
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the original study
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Summaries may miss details or leave out important information. Before applying or accepting participation, make sure you have read and understood the full study. Curemydisease.com takes no responsibility whatsoever for anything missed, misunderstood, or acted upon as a result of our summary — we know it does not capture everything.
This is a summary of the original study . Summaries may miss details or leave out important information. Before applying or accepting participation, make sure you have read and understood the full study. Curemydisease.com takes no responsibility whatsoever for anything missed, misunderstood, or acted upon as a result of our summary — we know it does not capture everything.
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Contacts and locations
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Locations
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Queen Mary Hospital
Hong Kong, 000000, Hong Kong
What this could mean
Our plain-language read of the trial. This is informational only — not medical advice or a prediction.
What this could lead to
If successful, this study could help explain how cannabis harms memory and thinking in the long term, and identify genetic risks specific to Asian populations.
What could go wrong
This is an observational study with only 110 participants, so results may not apply to everyone. It does not test a treatment, so no direct health benefit is expected.
Conditions
The condition(s) this trial relates to.
As listed by the trial registrant
The condition terms exactly as the trial's registrant entered them.