Cannabis ads double the risk of teen use, new study shows

This groundbreaking national study reveals how cannabis advertising and marketing promotions significantly influence whether young people start using cannabis. Researchers followed U.S. adolescents and young adults (ages 15-20) over two waves and found that exposure to any cannabis advertising nearly doubled the likelihood of cannabis initiation, with exposure through multiple channels creating even stronger effects. The findings demonstrate a clear dose-response relationship: those exposed through one advertising channel showed increased initiation risk, while exposure through three or more channels substantially elevated risk, suggesting that multi-channel marketing campaigns are particularly effective at encouraging new users to try cannabis for the first time.

Price-based promotions also played a role, though with a different pattern than advertising exposure. While discounts and promotional deals didn't significantly increase recent cannabis use (within the past 30 days), they were strongly linked to lifetime initiation—meaning young people exposed to sales promotions were more likely to have ever tried cannabis. This distinction is important: advertising pulls people toward immediate use, while pricing strategies appear to influence whether someone ever crosses the threshold into trying cannabis at all. Together, these findings highlight how commercial forces actively shape youth cannabis behavior through sophisticated marketing strategies.

The research has significant policy implications at a critical moment when cannabis commercialization is rapidly expanding with limited regulatory oversight compared to other substances. The authors emphasize that without strong marketing restrictions, the cannabis industry's advertising and promotional tactics will continue to drive initiation among young people. Their work provides crucial evidence supporting the need for public health policies that restrict youth exposure to cannabis advertising, require limits on price promotions, and address what researchers call the commercial determinants of cannabis use—the industry practices that directly influence who starts using cannabis and when.