Concerning consumer safety, it is not recommended to consume CBD liquids or e-liquids in general with the respective power outputs tested in this investigation (possibly in the false belief to produce psychotropic levels of THC). For example, harmful substances such as benzene can be formed from propylene glycol and glycerol, especially in high-power settings . Note that the e-cigarette itself heated up, so concerns regarding the safety and reliability of the device may arise when operated in the settings used. Furthermore, the high temperature of the vaporized liquid and the heating of the mouthpiece during the vaporization procedure might also cause severe injuries to lung tissue and burns to the mouth and oral epithelium, respectively. It should also be noted that upon inhalation at the highest temperature settings, the condensate and the remaining CBD liquid had a strongly unpleasant ammonia smell, which would make the consumption of CBD liquids with the respective settings impossible. This was observed in both liquids and may result from matrix and aroma compounds or non-inert components of the device (such as sealants and the vaporizer coil) which could have been broken down or disintegrated by high temperatures resulting from high power output.