Is There Diacetyl In E liquid? Vaped Grand Forks Public Health Do you know about vaping and popcorn lung? Diacetyl is frequently added to flavored e liquid to enhance the taste. Inhaling diacetyl Instagram What is the Link Between Popcorn Lung and Vaping? The Dunken Law Firm Vapes and e cigarettes aren't risk free. Knowing what's in them can help you decide what's right for you. They can contain things like heavy metals (nickel, tin, lead), flavorings (like diacetyl, linked to All E Cigarettes Emit Harmful Chemicals, but Some Emit More Than Others Berkeley Lab Berkeley Lab News Center