Yes, the newest vape-industry buzzword. Diacetyl has recently caught fire (not literally) in conversations among leading e-liquid manufactures and their FDA counterparts. But what in the world is it? Could it be the vaping equivalent to gluten? Let's break it down.
Diacetyl is a naturally occurring chemical that is produced as a bi-product of yeast during the fermentation process. It's involvement in the food industry is prevalent. You may enjoy the deliciousness of diacetyl when being used as flavoring in microwavable buttered popcorn. So what's the big deal? Recently, it has earned a bad name for itself as being the probable cause of several popcorn factory workers developing what has been named "popcorn lung" (for lack of better terms) or more specifically bronchiolitis. However this is nothing to joke about. Bronchiolitis is a rare and serious fixed lung disease. (Information gathered from Wisegeek 1)
The link between diacetly and bronchiolitis has yet to be proven. However, the FDA has posted a statement regarding the issue.
While the FDA has listed diacetyl on their list of food products Generally Regarded as Safe (GRAS), they have yet to conduct studies in regards to the studies on the inhalation of diacetly in vapor form. According to Mt. Baker Vapor, diacetyl a common ingredient found in tobacco and has been for over 50 years. Those who smoke cigarettes or have in the past have been inhaling diacetyl for as long as they've been smoking.
Mt. Baker Vapor does an incredible job summarizing all of this information.
We hope our information helped you gain an understanding on diacetly!