New study reveals the worst e cigarette flavor to inhale and it's a popular one My Worst Play The Real Cost Is Vaping Worse Than Smoking? St. Vincent's Medical Center 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 Top 10 WORST Flavorings DIY OR DIE Vaping