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Posted on 04/28/2026 10:41:29 AM PDT by dennisw
Teens who use marijuana may be at greater risk of permanent brain damage later in life, a study has revealed.
About 18 million Americans report using marijuana daily or nearly every day, and use is on the rise, largely due to recent decriminalisation across the US. From 1992 to 2022, for example, daily and near-daily use saw a 15-fold increase.
About one in seven of those users are teenagers, whose brains are still undergoing rapid changes in areas responsible for judgement, decision-making and memory.
Now, the largest-ever study of American teenagers has found regular cannabis use restricted vital growth in memory, attention, language and processing speeds over time, despite normal development when they were younger.
However, as they moved into later adolescence, their development in these areas slowed compared with their peers.
Experts from the University of California San Diego believe the culprit is tetrahydrocannabinol (THC), the psychoactive ingredient in marijuana, which was linked to worse memory in teens compared with cannabidiol (CBD), which is not intoxicating.
It is thought THC may lead to shrinkage of the hippocampus – the brain’s memory centre – and changes in white matter, which controls how different parts of the brain communicate with each other.
The researchers said while the deficits were small, the brain develops so quickly during adolescence that even subtle shifts could affect school performance and daily life.
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Yes, and iirc, in Andorra you are ineligible to vote until you are 25 years old - just the same as in Germany before 1919.
You don’t need this study to know that weed depresses intelligence.....Joe Rogan....
Terrible. Horrific.
Cannabis is a dreadful drug indeed, the effects of which are often underestimated. I am deeply sorry for what happened to your cousin 😞
I know this is off topic, but benzodiazepines are freaky drugs. I caution against their use, even with prescriptions.
I stay away from him best I can.
A guy at church has been smoking it since HS but swears Vietnam made him do it.
From what I hear, I am the Black Sheep of the family because I do not use it except topically.
Dirty habit practiced
Wonder how many of the have parents that were flower power stoners in the 60’s & 70’s.
Kids learn more by their parents actions then any other way.
Sorry to hear. I have never liked stoners.
benzodiazepines are freaky drugs
Bears repeating.
Just ask Jordan Peterson.
I know , right!
Now I have a disability, maybe I can get disability money and buy more weed man….
Or be smart and don’t play around with drugs at all.
Just horrible
Very sorry for his fate, too😞
If only young people simply wouldn’t start taking drugs…it’s so destructive…
Um yeah, that’s how it ends up.
IOW, your brother stopped maturing about the time he started smoking pot. Very common phenomenon with alcohol and other drugs.
The old ad....it’s why they call it dope.
I saw the mental deterioration in high school classrooms in MONTHS not anything like years.
Unfortunately.
Pot heads disagree. but you can’t trust what they say because their minds are stunted. So, don’t listen to pot heads.
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