For the fifth year in a row, researchers worldwide published more than 4,000 scientific papers related to marijuana in 2025, according to a new analysis by the advocacy group NORML.
All told, since the beginning of 2015, there have been more than 37,000 published papers about cannabis, the group said, largely reflecting “researchers’ newfound focus on marijuana’s therapeutic activities as well as investigations into the real-world effects of legalization laws.”
“Despite the perception that marijuana has yet to be subject to adequate scientific scrutiny, scientists’ interest in studying cannabis has increased exponentially in the past decade, as has our understanding of the plant, its active constituents, their mechanisms of action, and their effects on both the user and upon society,” NORML Deputy Director Paul Armentano said in a press release.
“It is time for politicians and others to stop assessing cannabis through the lens of ‘what we don’t know’ and instead start engaging in evidence-based discussions about marijuana and marijuana reform policies that are indicative of all that we do know,” he said.
To tally the papers, NORML conducted a keyword search of the National Library of Medicine’s resource PubMed.gov. In total, the advocacy group said on Wednesday, PubMed now
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