Cardiovascular diseases, respiratory diseases and cancer were assessed at baseline and for up to 180 days. The main biomarker studied was NNAL – 4-(methylnitrosamino)-1-(3-pyridyll)-1-butanol, showing the effects of nicotine-derived nitrosamine ketone (associated with lung cancer). In those who continue to smoke, its level remained stable throughout the observation period. In those who switched to the tobacco heating system, the level of NNAL decreased by 33-93%, in those who quit smoking – by 62-98% according to the analysis from the 30th […]