A recent meta-analysis, published in the International Journal of Stroke and led by researchers at the University of Cambridge, found that people who use marijuana have a higher risk of stroke: Weed increased that risk by 37%. This is a data point on how millions of people around the world are being harmed by recreational drug use even as Big Marijuana promises that their products are not only safe but even beneficial to health. It highlights why policymakers should invest in prevention, treatment, and recovery and fight commercialization and normalization.