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Scientists Link Cannabis to Stroke—and Casual Users Aren’t Off the Hook

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Scientists Link Cannabis to Stroke—and Casual Users Aren’t Off the Hook

People who regularly use cannabis might be taking a chance with their cardiovascular health, new research suggests.

Scientists at Tulane University studied nationally representative survey data, finding that people who reported using cannabis were significantly more likely to also report having had cardiovascular disease, particularly stroke, than those who didn’t use cannabis. This study doesn’t conclusively show that cannabis can cause cardiovascular problems, but it’s the latest bit of concerning data pointing in that direction.

Several studies have previously found a connection between cannabis use and cardiovascular disease, though this research hasn’t been entirely consistent. Given that cannabis use has risen substantially in recent years, thanks to increasing recreational legalization, the researchers wanted to get an updated picture of the situation.

To do so, they analyzed data from the Behavioral Risk Factor Surveillance System (BRFSS), a longstanding annual survey of Americans’ health trends and habits managed by the Centers for Disease Control and Prevention. They looked at BRFSS data collected between 2020 and 2024, which collectively included nearly a half million adult respondents.

Compared to non-tokers, people who regularly used cannabis—whether once a month or daily—were around 20% more likely to report a history of any cardiovascular issues, the study showed. This added associated risk didn’t differ much between people who used cannabis occasionally (one to five days a month) and heavy cannabis users (16 to 30 days a month). Interestingly enough, however, the risk of stroke in particular was higher among less frequent cannabis users (40% higher) than among heavy users (25% higher).


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