The study identified six potentially harmful substances, including three chemicals never previously found in e-cigarettes. This includes stimulant caffeine in two of the four products. It further noted that Caffeine has previously been detected in e-cigarettes but only in caffeine-oriented flavours like coffee and chocolate. This may be due to manufacturers adding it intentionally, without disclosing, to give smokers an extra kick. Besides caffeine, researchers found three industrial chemicals, a pesticide, and two flavourings linked with possible toxic effects and respiratory irritation.The research found thousands of unknown chemicals in the vaping liquid, and the number of compounds increased significantly in the aerosol. Furthermore, condensed hydrocarbon-like compounds, typically associated with combustion were also detected which manufacturers claimed is not happening during vaping. In traditional cigarettes, the condensed hydrocarbons generated during combustion are toxic.
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