Regulation of vapes and e-cigarettes has been in the news this week, after San Franciscans voted yes on a proposition that would prohibit the sale of flavored tobaccos [...]

But while proponents of the ban succeeded by arguing that flavored tobacco products were a way for kids and teens to get hooked on tobacco products, a more looming public health issue lies in the mystery surrounding the safety of the flavoring chemicals inside e-cigarette liquids [...]