States with legal recreational marijuana had fewer cases of vaping-related lung injuries than other states, according to a study published earlier this month by JAMA Network Open.
No surprise here: earlier research found that the culprit behind the injuries was likely vitamin E acetate, a substance used in black-market marijuana vaping products. If people could easily get legal marijuana, it would be less likely that they would turn to the black market.
To conduct the study, researchers analyzed data from the Centers for Disease Control and Prevention on electronic cigarette- or vaping-
associated lung injury (EVALI) cases from states, factoring in population and the prevalence of e-cigarette use.
The study found that states with legal recreational marijuana dispensaries had 1.7 cases of EVALI per million people, while states that prohibit adult-use cannabis had 8.1 cases per million. (States with only medical marijuana saw 8.8 EVALI cases per one million residents, which was not statistically significant.)
You can read the full study
here.