I see replies that keep repeating the same "it's got no smoke and tar so it must cause far less harm", as if common sense always matches reality. Coating the lungs with cooked propylene glycol and glycerine could cause similar harm to smoke and tar, or even entirely new harms, but I don't really know that. Use empiricism and share reviews, please.

Direct health implications of e-cigarette use: a systematic scoping review with evidence assessment https://pmc.ncbi.nlm.nih.gov/articles/PMC11317248/

"Conclusion: Smokers or former smokers who switch to e-cigarettes may reduce their exposure to carcinogens and lower their risk of developing severe health issues associated with conventional smoking. However, in healthy individuals who have never smoked traditional cigarettes, the use of e-cigarettes introduces several cardiovascular and respiratory adverse effects. These findings suggest that while e-cigarettes can be a strategic harm reduction tool for smokers, they are not a safe option for non-smokers."

E-Cigarette Use, Small Airway Fibrosis, and Constrictive Bronchiolitis https://pmc.ncbi.nlm.nih.gov/articles/PMC10137322/

"CONCLUSIONS: After thorough evaluation for other potential etiologies, vaping was considered to be the most likely common causal etiology for all patients due to the temporal association of symptomatic chronic lung disease with e-cigarette use and partial improvement in symptoms after e-cigarette cessation. In this series, we associate the histopathologic pattern of small airway–centered fibrosis, including constrictive bronchiolitis, with vaping, potentially defining a clinical and pathologic entity associated with e-cigarette use. (Funded in part by the National Institutes of Health.)"

E-cigarettes and Vaping: A Smoking Cessation Method or Another Smoking Innovation? https://pmc.ncbi.nlm.nih.gov/articles/PMC9833272/

"Abstract: [cut] With well-known health risks from traditional smoking, e-cigarettes are viewed as a safe way of smoking, appealing more to youth. Additionally, extensive e-cigarette marketing boosted by the internet and fame has resulted in worries that e-cigarettes can lead to a renormalization of cigarette smoking and can be used as a new method to consume vaporized drugs. Although the concern that e-cigarettes are as harmful as traditional smoking has been raised, youth and most healthcare providers remain relatively unaware. [cut]"

The reality is that cigarette smoking was on the way out with young people before vapes came along. Whether it's less harmful isn't the only relevant point, if it's still harmful and has dramatically expanded the market then it's a bad thing.

We do have many decades of inhaled medications that used pg and vg carrier vapors so its not like we have zero idea on their relative safety. It may cause some harm, but it is assuredly less harmful than smoking or else people using asthma inhalers would have shown significant problems from it.

>> My thing is, how healthy are ecigs compared to real cigarettes really?

> Use empiricism

> Smokers or former smokers who switch to e-cigarettes may reduce their exposure to carcinogens and lower their risk of developing severe health issues associated with conventional smoking.