Loukas A, Lewis MJ, Marti CN, et al. - This study was undertaken to investigate the longitudinal associations between exposure to tobacco advertisements in magazines popular among young adults and changes in the number of tobacco products used by young adults. Researchers conducted a longitudinal study including 4,824 students from 24 Texas colleges. They objectively assessed tobacco advertisements in 11 magazines, collected from 2015 to 2017, and young adults self-reported the frequency of reading each magazine on five biannual surveys from 2015 to 2017. They applied growth curve models to ascertain whether exposure to tobacco advertisements in magazines predicted changes in the number of tobacco products used across the 2-year period, controlling for sociodemographic factors, ever tobacco use, recall of tobacco advertisements on the internet, and personality characteristics. Among young adults, tobacco advertising in magazines contributes to the continuation of single-product and polyproduct use. Data indicate the need for additional federal regulations limiting advertisements for all types of tobacco products in magazines, especially those popular among young adults, the youngest legal targets of the tobacco industry.