Vaping teens at risk of toxic metal exposure 'linked to brain damage' worst offending flavours revealed Do You Still Vape? What's The Worst Flavor For Your Lungs KJ103 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 This is the worst e cigarette flavor to inhale, scientists warn These could be the worst vape flavours for your health, according to science BBC Science Focus Magazine