Diacetyl in Vape Juice: What the Science Says and Why We Test
Last Updated: October 2026 When researchers at Harvard published a study examining potentially harmful flavoring chemicals in electronic cigarettes in December 2015, the findings generated considerable attention. The researchers detected at least one of three chemicals—diacetyl, acetoin, and 2,3-pentanedione—in 47 of the 51 flavored e-cigarette products they tested. For many consumers, this was their first […]
