[#item_full_content] Now that cannabis has become widely available across much of the United States, the scientific community is finally getting a clearer picture of what heavy long-term use might actually be doing to our brains. And according to a massive new review published in the Journal of Psychiatric Research, one of the clearest patterns emerging is 
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Heavy Cannabis Use May Be Doing the Opposite of What You Want, Scientists Say
ByPot Shop News
May 16, 2026