Frequent cannabis smoking may significantly increase a person’s risk for heart attack and stroke, according to an observational study supported by the National Institutes of Health. The study, published in the Journal of the American Heart Association, uses data from nearly 435,000 American adults, and is among the largest ever to explore the relationship between cannabis and cardiovascular events.

Read more: Smoking cannabis associated with increased risk of heart attack, stroke | National Institutes of Health (NIH)