Yes, vaping is toxic and the consequences can be permanent. A U.S. teenager developed popcorn lung a life altering, incurable condition after secretly vaping flavored e cigarettes for Respiratory Impact of Electronic Cigarettes and Low Risk Tobacco Ecigarettes and respiratory health: the latest evidence Miyashita 2020 The Journal of Physiology Wiley Online Library Smoking cigarettes has long been proven to cause severe lung damage, including chronic obstructive pulmonary disease (COPD), emphysema, and lung cancer. Over time, cigarette smoke destroys lung tissue, fills airways with tar, Health effects and known pathology associated with the use of E cigarettes ScienceDirect