Even occasional marijuana use linked to 40% higher odds of stroke

New research involving more than 440,000 Americans links cannabis use to increased cardiovascular risk, with occasional users showing 40% higher odds of reporting a history of stroke. The findings suggest that even infrequent marijuana use may warrant concern, although researchers have not established that cannabis directly causes strokes or heart disease. New preliminary research involving more than 440,000 American adults has uncovered a concerning association between cannabis use and cardiovascular disease, particularly stroke. The findings suggest that even occasional marijuana use may be linked to higher odds of cardiovascular problems, raising new questions about the health effects of a substance that is becoming increasingly common across the United States.

The research, presented at the American Heart Association's Scientific Sessions 2026, found that the association was not limited to people who frequently used cannabis. It also appeared across different methods of consumption (smoked or edible, etc.). Researchers emphasized that cannabis use should be considered when discussing heart health and stroke prevention. Scientific Sessions 2026 took place November 6 through 9 in Chicago, bringing together cardiovascular researchers and healthcare professionals from around the world to share scientific discoveries, clinical advances, and emerging evidence. Cannabis refers to the plant itself, while marijuana is a commonly used term for cannabis products containing enough THC to