Switching to Juul e-cigarettes reduces smokers' risk to cigarette toxins at similar levels to quitting entirely, according to results from a clinical trial presented at a conference Saturday.

Researchers found switching entirely to Juul reduced smokers' exposure to biomarkers, or signals of exposure to cigarette smoking, 99.6 percent as much as abstaining entirely from cigarettes. [...] In the study presented Saturday, researchers tested 90 adult smokers for nine biomarkers associated with combustible cigarette smoke. [...]