Harmful substances in e liquid flavorings what should you know? CHEMNOVATIC Approximately 16,000 unique flavours have been identified for vapes, many of which appeal to potential users. Some flavours increase the toxicity of vape emissions and can generate compounds that are known to Diacetyl In Vape Juice Characteristics, Effects, & Diacetyl Free E Juice Vapes with Diacetyl List: Brands and Flavors to Avoid Understanding Popcorn Lung and Diacetyl: Risks and Prevention Vapestore Blog