It's official. Flavored e cigarettes cause permanent lung damage. And doctors are already seeing it happen. In the United States, a teenager developed something called popcorn lung after secretly vaping for three years. Diacetyl Wikipedia Diacetyl & Popcorn Lung EDGE Vaping Popcorn Lung: A Dangerous Risk of Flavored E Cigarettes American Lung Association Banned Dangerous Vape Ingredients to Avoid in Your Vape Juice Which brands contain diacetyl in their vape juices? Knowledge Kaiweili Digital Technology