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Study finds marijuana has no effect on teen brain tissue, unlike alcohol use

Researchers at UC San Diego and the University of Pittsburgh announced the results of a study that regular marijuana use doesn’t damage brain tissue, while routine drinking does.

The brains of 92 young people — ages 16 to 20 — were scanned by UC San Diego researchers over 18 months. The participants with histories of alcohol and marijuana use, about half, continued using. The other half abstained or maintained minimal use. The study observed physical brain tissue, not overall performance of the participants.

The before-and-after scans showed that teens drinking at least 5 drinks per week had reduced brain tissue health — possibly leading to declines in attention span, memory and decision-making. The brain tissue of teens who used only marijuana up to 9 times per week showed no physical damage. Read more

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Stephen Carter

Stephen Carter is a 30 year old journalist and information technology specialist living in Waco, Texas. He has been working with the cannabis movement since 2009. He founded Texas Cannabis Report in 2013 to bring Texans accurate cannabis related news.

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  1. weediswhatyoumadegod@yahoo.com
    February 4, 2014 at 1:17 am

    I wonder why other studies have shown that marijuana does negatively affect adolescent brains. I hope this one is the correct one, from my experience with marijuana, it is pretty damn harmless. Its safer than tyenol and guess what, safer than water.You can overdose on water and not on marijuana. There shouldn’t be any debate over this, its all politics, its all bullshit and its bad for you. Marijuana is good for you though, thats why we have a whole damn section of cannabinoid receptors in our brains. We’re already hard-wired to accept and successfully process the chemicals from the plant. “Weed is what you made god”. “God put this on the erf for me and you!”