Teens Find a Big Loophole in the New Flavored Vaping Ban The New York Times 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 Vaping is on the rise. While e cigarettes don't contain tobacco, they may still contain many of the same toxic and cancer causing chemicals found in regular cigarettes. This includes: Acrolein (weed Vape Juice Brands to Avoid: Harmful Ingredients & Worst Flavours