No long-term mortality study has tracked e-cigarette users from youth through old age, so the honest answer is that nobody can yet give you a definitive number of years gained or lost. What research can tell you is that vaping causes measurable cardiovascular, pulmonary, and cellular damage that tracks with shorter lifespans in other contexts. The picture gets more complicated depending on whether you’re comparing vaping to smoking, to never using nicotine at all, or to dual use of both products.
Why the Lifespan Question Is Still Technically Open
E-cigarettes entered the mass market around 2007, and widespread adoption in Western countries didn’t take off until roughly 2014. That means the oldest cohort of long-term vapers has only about a decade of heavy use behind them. Diseases that shave years off your life, like lung cancer, heart failure, and chronic obstructive pulmonary disease (COPD), typically take 20 to 40 years of exposure to fully develop and show up in mortality statistics. Researchers are left building the case from intermediate markers: what vaping does to your arteries, your airways, your DNA, and your immune system. Those markers consistently point toward harm, though the magnitude compared to smoking remains debated.
Cardiovascular Damage
Heart disease is the world’s leading killer, and the cardiovascular effects of vaping are among the most studied. A review of e-cigarette research found that vaping is linked to elevated oxidative stress, endothelial dysfunction, inflammation, arterial stiffness, and the development of atherosclerotic lesions in blood vessels.1PubMed Central. How Electronic Cigarette Affects the Vascular System Each of those changes, on its own, is a recognized step on the path toward heart attack and stroke. A randomized crossover trial found that a single session of nicotine-containing vaping measurably stiffened participants’ arteries and reduced the ability of small blood vessels to dilate, compared to both sham vaping and vaping without nicotine.2Scientific Reports. Differential Effects of E-Cigarette on Microvascular Endothelial Function, Arterial Stiffness and Oxidative Stress: A Randomized Crossover Trial These aren’t subtle shifts in a lab model; they’re the same kinds of vascular changes seen in habitual cigarette smokers.
Even brief exposure registers on the cardiovascular system. Using a JUUL device raised blood pressure and heart rate in young nonsmokers, while a placebo device without nicotine had no effect.3PubMed. Acute effects of electronic cigarettes on arterial pressure and peripheral sympathetic activity in young nonsmokers A systematic review of case reports found that among 20 patients who developed cardiovascular events while vaping, half were found in sudden cardiac arrest and the rest presented with chest pain, with various dangerous heart rhythm disturbances documented on resuscitation.4PubMed Central. The Impacts of Vaping on the Cardiovascular System: A Systematic Review of Case Reports Case reports are anecdotal by nature, but the pattern fits the broader laboratory and clinical evidence.
Lung Disease and Respiratory Risk
The lungs take the most direct hit from vaping, and the evidence here has grown substantially. A meta-analysis found that current e-cigarette users had roughly 48 percent higher odds of COPD compared to nonusers, while former users and ever-users showed even higher odds.5PubMed Central. Association of electronic cigarette use and risk of COPD: a systematic review and meta-analysis COPD is one of the leading causes of death globally, and any exposure that meaningfully raises its likelihood is a serious longevity concern. A separate study of people who had never smoked cigarettes found that e-cigarette use alone was linked to higher odds of asthma, COPD, and the overlap of both conditions.6Tobacco Induced Diseases. Electronic cigarette use and its association with asthma, chronic obstructive pulmonary disease (COPD) and asthma-COPD overlap syndrome among never cigarette smokers That finding is important because it removes cigarette smoking as a confounding explanation.
At the cellular level, the base liquids in e-cigarettes, propylene glycol and vegetable glycerin, aren’t inert once aerosolized. A study exposing human nasal epithelial cells to these aerosols found measurable cell damage, evidenced by increased release of a marker of cell death, even without nicotine in the mix.7PubMed Central. Propylene glycol and vegetable glycerin e-cigarette aerosols impact mucociliary function and cause cytotoxicity in human airway epithelium The mucociliary system, the escalator-like mechanism your airways use to sweep out debris and pathogens, was also disrupted. When that defense system falters, infections gain a foothold more easily.
The 2019 EVALI outbreak (e-cigarette or vaping product use-associated lung injury) offered a grim preview of acute vaping-related harm. Vitamin E acetate, used as a thickening agent mainly in illicit cannabis cartridges, was strongly linked to the outbreak, though researchers noted that more than one ingredient or thermal breakdown product could be responsible for lung toxicity.8PubMed Central. Toxicology of flavoring- and cannabis-containing e-liquids used in electronic delivery systems A follow-up study tracking EVALI survivors for a year found lasting consequences: nearly 4 in 10 had cognitive impairment, about half reported respiratory limitations, and roughly 6 in 10 experienced anxiety or depression.9PubMed Central. Prospectively Assessed Long-Term Outcomes of Patients with E-Cigarette- or Vaping-associated Lung Injury Despite those outcomes, only about a third of EVALI survivors had quit all vaping and smoking by the 12-month mark.
DNA Damage and the Cancer Question
Cancer takes decades to develop, so we won’t have large-scale vaping-specific cancer data for years. But researchers can measure the early biological steps that lead to cancer, and the findings aren’t reassuring. Lab studies show that e-cigarette liquid and vapor can cause DNA damage, DNA double-strand breaks, and cell death in oral cells.10PubMed Central. DNA damage in human oral cells induced by use of e-cigarettes E-cigarette aerosol can also trigger the formation of DNA adducts, which are chemical modifications to DNA that promote mutations and inflammation.11PubMed Central. Mechanisms of E-Cigarette Vape-Induced Epithelial Cell Damage
A study comparing vapers, smokers, and nonusers found that DNA damage in key repair genes was over two-fold higher in vapers compared to nonusers, and the damage increased in a dose-dependent manner between light and heavy users.12PubMed. What e-cigarette factors determine oral epithelial DNA damage in consumers? The damage levels in vapers were comparable to those found in smokers, which is a striking finding given the assumption that vaping produces fewer carcinogens. Research on telomeres, the protective caps on chromosomes that shorten with aging, suggests e-cigarette vapor causes telomere dysfunction similar to what conventional smoking produces.13Toxicology Letters. The Impact of Lifestyle on Telomere Length: Exploring the Effects of smoking, vaping and alcohol consumption Shorter telomeres are associated with earlier onset of age-related diseases.
Where vaping does look measurably better than smoking is in overall carcinogen exposure. A study comparing toxic volatile organic compound levels found that concentrations were consistently higher during smoking than vaping, with the difference ranging from about 1.3-fold for some compounds to more than 7-fold for others.14PubMed Central. Comparison of Systemic Exposure to Toxic and/or Carcinogenic Volatile Organic Compounds (VOC) during Vaping, Smoking, and Abstention A separate study found that several carcinogen metabolites were significantly lower in vapers’ urine than in smokers’ urine.15PubMed Central. Evaluation of toxicant and carcinogen metabolites in the urine of e-cigarette users versus cigarette smokers So vaping produces fewer known carcinogens, but the DNA damage it does cause is real and not negligible.
How Vaping Compares to Smoking
The comparison between vaping and smoking is where the lifespan question gets its most nuanced treatment. A broad review of the evidence concluded that although e-cigarettes generally showed reduced toxicity compared to traditional cigarettes, they still caused significant cardiopulmonary changes, including increased inflammation, oxidative stress, and endothelial dysfunction.16PubMed. The impact of e-cigarettes versus traditional cigarettes on long-term cardiopulmonary outcomes The severity of those changes was typically less than what cigarettes produce, but the authors were careful to note that e-cigarettes are not harmless with respect to heart and lung health.
One modeling study projected what would happen to population health if large numbers of smokers switched to vaping. Under the vast majority of scenarios modeled, switching produced net life-years saved by 2100, with people who quit smoking through vaping gaining an estimated extra 1.2 to 2.0 years of life compared to smokers who quit without vaping.17PubMed Central. A Magic Bullet? The Potential Impact of E-Cigarettes on the Toll of Cigarette Smoking That model assumed vaping served as a bridge away from combustible tobacco. For someone who was never going to smoke, the math looks different: any vaping-related health damage represents a pure loss rather than a trade.
This is the tension at the center of the debate. For a current pack-a-day smoker who switches completely to vaping, the health trajectory almost certainly improves. For a teenager who starts vaping with no prior tobacco use, the trajectory only goes downward. And research in adolescents has linked vaping to respiratory problems, cardiovascular effects, neurodevelopmental concerns, and an increased likelihood of later transitioning to combustible cigarettes.18Sokoto Journal of Medical Laboratory Science. Vaping versus smoking in adolescents: A mini review of health risks and behavioural trends
The Dual Use Trap
Many people who vape don’t fully quit cigarettes. They cut back on smoking while adding e-cigarettes, becoming “dual users.” The assumption is that less smoking plus some vaping must be better than full-time smoking. The data says otherwise. A large population-based study found that dual users of both e-cigarettes and traditional cigarettes had higher disease odds than people who smoked cigarettes alone, with pooled odds ratios ranging from 1.20 to 1.41 across multiple health outcomes.19PubMed Central. Population-Based Disease Odds for E-Cigarettes and Dual Use versus Cigarettes If your goal is a longer life, partial switching that never becomes complete switching could be worse than the status quo.
One analysis of the cessation landscape put it bluntly: the smoking-cessation benefit of vaping is likely offset by the positive link between vaping and smoking initiation, since rising e-cigarette use risks reversing the long-term decline in youth smoking rates.20Preventive Medicine Reports. Smoking cessation or initiation: The paradox of vaping At the population level, that means even if vaping helps some individual smokers live longer, the net lifespan effect depends on how many new users it creates.
Metal Contamination From Device Hardware
A source of harm that most vapers don’t think about is the device itself. The heating coils that vaporize e-liquid are made of metal alloys, and those metals leach into the aerosol you inhale. A scoping review of cannabis vape devices found that structural components leached nickel, chromium, lead, cobalt, cadmium, and copper into the aerosol as tiny particles, with leaching worsened by higher temperatures, device age, and certain liquid characteristics.21PubMed Central. Heavy Metals in Cannabis Vapes and Their Health Implications—A Scoping Review A study looking at nicotine e-liquids found similar patterns: metal concentrations in the liquid increased after contact with coils, with some metals jumping by orders of magnitude depending on the coil material.22Heliyon. Occurrence of metals in e-cigarette liquids: Influence of coils on metal leaching and exposure assessment Chronic low-level exposure to heavy metals like lead and cadmium is linked to kidney damage, neurological problems, and cancer risk over time.
Weakened Immune Defenses
Your lungs rely on specialized immune cells to fight off bacteria and viruses. E-cigarette vapor appears to compromise that defense system. In mice exposed to e-cigarette vapor, lung macrophages (the immune cells tasked with engulfing and destroying pathogens) increased in number but became worse at their job. When those mice were exposed to pneumonia-causing bacteria, bacterial growth in the lungs was significantly higher. In influenza experiments, vapor-exposed mice showed elevated viral loads, delayed recovery, worse weight loss, and a 20 percent mortality rate compared to zero in unexposed mice.23PubMed Central. E-cigarette exposures, respiratory tract infections, and impaired innate immunity: a narrative review Animal models don’t translate perfectly to humans, but the mechanism is concerning: if vaping weakens your first line of defense against respiratory infections, the cumulative burden of illness over a lifetime could meaningfully affect health.
Even bystanders aren’t fully spared. Secondhand vape exposure in a home setting raised nicotine byproducts in saliva and cobalt in urine among nonsmoking housemates, confirming that the aerosol doesn’t just vanish.24PubMed. Exposure to secondhand aerosol from electronic cigarettes at homes: A real-life study in four European countries The nicotine concentrations in secondhand vape aerosol are roughly a tenth of those from cigarettes, though.25PubMed Central. Secondhand Exposure to Vapors From Electronic Cigarettes Secondhand cardiac effects have also been explored: nicotine concentrations during one-hour exposure to e-cigarette emissions were linked to changes in heart rate variability in bystanders, a marker of autonomic nervous system disruption.26PubMed Central. Cardiac Autonomic Effects of Secondhand Exposure to Nicotine from Electronic Cigarettes An Exploratory Study
Vaping During Pregnancy
The lifespan question takes on another dimension when a developing fetus is involved. A meta-analysis comparing vaping mothers to nonsmokers found that vaping during pregnancy was associated with a 40 percent higher risk of preterm birth, a 49 percent higher risk of low birth weight, and a 32 percent higher risk of the baby being small for gestational age.27Women and Birth. Maternal vaping and pregnancy adverse outcomes: A systematic review and meta-analysis Each of those outcomes carries its own long-term health consequences for the child, and preterm birth in particular is a well-established predictor of complications that can extend across a lifetime. Some pregnant smokers switch to vaping thinking it’s safe; this evidence suggests it isn’t, at least not compared to quitting nicotine entirely.
Oral Health Effects
Vaping also appears to affect the mouth in ways that go beyond cosmetic concerns. Research has documented inflammatory biomarkers and growth factors in the saliva and gum fluid of e-cigarette users, indicating that vaping triggers an inflammatory response in the oral cavity.28PubMed Central. Effects of Vape Use on Oral Health: A Review of the Literature Chronic oral inflammation is tied to gum disease, tooth loss, and growing evidence links it to systemic conditions like cardiovascular disease. This is also where the DNA damage findings discussed earlier become relevant: the mouth is the first tissue the aerosol contacts, and it accumulates the highest concentrations of vaping byproducts. The oral DNA damage seen in vapers, comparable to smokers and dose-dependent with heavier use, suggests the mouth may be a particularly vulnerable site for long-term harm.12PubMed. What e-cigarette factors determine oral epithelial DNA damage in consumers?
One review noted that vaping’s effects on lung function and cardiovascular function were, in some measures, similar to those of smoking, which complicates the blanket claim that vaping is dramatically safer.29PubMed Central. Is vaping better than smoking for cardiorespiratory and muscle function? The picture that emerges is of a product that is probably less deadly than cigarettes when it fully replaces them, but that carries its own portfolio of risks that, over a lifetime, have real potential to shorten how long you live and how well you live in your later years.