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 Vapemate Keeps Bad Chemicals Like Diacetyl Out of Your Eliquids Chemical flavorings found in e cigarettes linked to lung disease Harvard Gazette How Do I Know My E Liquid is Safe? RED Box Vape Red Box Vape Frontiers Inflammatory and Oxidative Responses Induced by Exposure to Commonly Used e Cigarette Flavoring Chemicals and Flavored e Liquids without Nicotine 10 Things to Know About Diacetyl in E Juice