e cigarettes News PET Imaging Shows Greater Lung Inflammation in e cigarette Users than Cigarette Smokers Imaging Technology News A new study has found that when the main ingredient in most e cigarette fluids is heated, it forms two toxic chemicals capable of harming human lung cells. The research, published in Frontiers Mechanisms of E Cigarette Vape Induced Epithelial Cell Damage JCI Electronic cigarettes disrupt lung lipid homeostasis and innate immunity independent of nicotine