In its report on what it called electronic nicotine delivery systems (ENDS), the WHO said: "The fact that ENDS exhaled aerosol contains on average lower levels of toxicants than the emissions from combusted tobacco does not mean that these levels are acceptable to involuntarily exposed bystanders
Vaping and Blood Pressure While Public Health England has stated that vaping products are an estimated 95% less harmful than cigarettes, primarily due to the absence of harmful by-products found in cigarette smoke, the presence of nicotine in vapes means that the risk of hypertension could be comparable
CO also inhibits cytochrome c oxidase in your mitochondrial respiratory chain, impairing cellular energy production at the molecular level
Furthermore, among ex-smokers who had quit less than five years prior to the study, those who had gone on to use e-cigarettes were more likely to develop lung cancer (adjusted HR=1.23, 95%CI 1.091.39), and to die from lung cancer (adjusted HR=1.71, 95%CI 1.102.66) than those who had not