to provide further proof that the flavoring compounds , not the carrier eliquid solvents most commonly propylene glycol andor vegetable glycerin dominated production of aldehydes during vaping , the authors performed a series of experiments in which a test flavored eliquid was diluted with different amounts of the unflavored eliquid . Liquids with higher flavor content produced larger amounts of aldehydes due to pyrolysis of the flavoring compounds . Makes me wonder how diluted it was and if they understood what a typical percentage of concentrated flavor would be in the overall liquid as they stated that this research is new to them <| sep |> Spoiler tags dude ! I was trying to cover for people who have not played the first one yet .