Does vaping cause lung cancer? Vaping alone has not been shown to cause lung cancer, but it is not proven safe, and the research is still catching up. The main worry is people who vape and smoke: a 2026 study found that adults under 50 who did both had about 2.8 times the odds of lung cancer compared with smokers alone.
Has vaping been linked to lung cancer?
In its January 2026 article on Cleveland Clinic’s vaping and lung cancer article, Cleveland Clinic says “It’s not yet clear whether vaping causes cancer,” and that to date there are no verified cases of lung cancer related to vaping. Its pulmonologist adds: “Only time will tell if vaping also causes lung cancer, but the potential is certainly there.”
MD Anderson’s cancer center makes a similar point. Its MD Anderson article on vaping and lung cancer quotes Edwin Ostrin, M.D., Ph.D.: “We don’t really know what we’re delivering into the lungs yet.” He adds: “If there are little bits of damage that build up over years, we may not see it for decades.”
The 2025 systematic review of vaping and cancer published in Tobacco Induced Diseases included 39 studies, most of them cell, animal or other lab studies. It found no significant risk of lung cancer or other cancers in human studies of people who vape but have never smoked. It also found substantial biomarker-based evidence, meaning body and lab markers such as DNA damage and oxidative stress, after e-cigarette exposure. Most of its 39 studies were cell, animal or other lab work rather than studies of people, and the authors call the overall cancer evidence limited.
The review also explains why the answer is still open. It notes that cancer usually has a long latency period, about 20 years for lung cancer, and the only long-term study it found followed people for two years, which the authors say is not enough for developing cancer.
What did the new 2026 study find?
The 2026 Frontiers in Oncology case-control study linked here is a case-control study. It compared 256 adults under 50 with confirmed lung cancer against 2,921 people without cancer, matched on age, sex, race, location and year of visit. This study does not measure what happens when someone switches from smoking to vaping.
Case-control studies compare people who have a disease with people who do not. They show an association, which is not the same as proof that one thing causes another. The odds ratios below compare the odds of cancer with people who neither smoked nor vaped.
| Group (adults under 50) | All lung cancer (odds ratio, 95% CI) | Adenocarcinoma, the most common type (odds ratio, 95% CI) |
|---|---|---|
| Vaped and smoked | 13.8 (7.7-24.9) | 14.8 (8.0-27.4) |
| Smoked only | 5.0 (3.7-6.9) | 4.0 (2.9-5.6) |
The authors describe their result as the first evidence that smoking combined with vaping significantly increases lung cancer risk in adults under 50. They also state limits that matter for your decision. Vaping and smoking were self-reported, the records did not allow them to measure either habit in as much detail as planned, and the timing of vaping relative to smoking was not captured. That timing is exactly the question about switching from smoking to vaping, so this study cannot answer it. The authors also lacked data on secondhand smoke, air pollution and genetic predisposition. For what the research says about using both products, see vaping smoking and dual use.
Is vaping worse than smoking?
Vapes do not contain the tar found in cigarettes, which is why many people assume they are safer. Cleveland Clinic still says vapes are loaded with chemicals associated with lung cancer and that “Many chemicals in vapes are known carcinogens.” Its examples include acetaldehyde, benzene, formaldehyde and toxic metals such as lead, chromium, nickel and cadmium.
The comparison is mixed. The 2025 review describes an earlier King’s College London review that found biomarker evidence that cancer risk from vaping might be greater than for non-users but lower than for smokers. MD Anderson’s Ostrin says vapor seems less harmful than tobacco smoking, while noting that the long-term effects are not yet known. For a fuller side-by-side look at the respiratory research, see vaping vs smoking.
Does vaping damage the lungs?
Yes, several lung conditions have been linked to vaping. Johns Hopkins describes them in its Johns Hopkins article on what vaping does to your lungs. The table lists the main ones and what to watch for.
| Risk | What it is | What to watch for |
|---|---|---|
| EVALI (e-cigarette or vaping use-associated lung injury) | A serious inflammatory lung condition. MD Anderson notes a large 2019 outbreak tied to e-liquid thickened with vitamin E acetate. See e-cigarette and vaping lung injury evali. | Chest pain, cough, shortness of breath |
| Popcorn lung (bronchiolitis obliterans) | Damage to the smallest airways, linked to the flavoring chemical diacetyl | Coughing, wheezing, chest pain, shortness of breath |
| Vaping-related lipoid pneumonia | Inflammation caused by oily substances in e-liquid | Chronic cough, coughing up blood or blood-tinged mucus |
| Collapsed lung (pneumothorax) | A hole in the lung that lets air escape. Hopkins says smoking and vaping are associated with bursting the air blisters that can cause it. | Sharp chest or shoulder pain, difficulty breathing |
| Asthma and COPD | Cleveland Clinic says chemicals in vape liquids have been linked to both | Wheezing, shortness of breath, lingering cough |
| Lung infections | Lung.org’s American Lung Association vaping blog says research has shown pneumonia, bronchitis and other lung infections are more common in people who vape | Infections that keep coming back |
| Nicotine addiction | Lung.org says one pod can contain as much nicotine as an entire pack of cigarettes | Cravings, irritability, trouble sleeping |
Heart disease is linked too. Cleveland Clinic says vaping has been found to contribute to heart disease and to affect your ability to be physically active. Secondhand vapor is not harmless either. Johns Hopkins says the vapor a person exhales may contain nicotine, ultrafine particles, diacetyl and benzene, and that it is better to avoid it if possible. If you are a worried family member, the vaping aerosol exposure around others guide covers household boundaries. For a broader list of risks, see vaping dangers.
What about one puff a day, or two years of vaping?
The research does not set a safe number of puffs. A 2021 study cited in the 2026 paper reported a 30% increase in a marker of oxidative stress (CD45+ cell markers) after one vaping session in otherwise healthy young people with no history of smoking or vaping. That is a short-term finding, not a cancer result.
Two years is too short a window for cancer to appear in studies, which is a different question from whether your lungs are affected. The 2025 review found only one long-term study, and said two years is not enough for cancer to develop. Cleveland Clinic says people with a smoking history usually develop lung cancer decades after they started, often in their 60s or later. The lung symptoms in the table above matter now, whatever the number of years.
If you vape only a little and want to know whether it matters, the most useful step is to bring your full vaping and smoking history to a clinician.
Has anyone gotten cancer from vaping?
Cleveland Clinic reports no verified cases of lung cancer linked to vaping so far. The 2025 review describes one case report: a 33-year-old man with a 20-pack-year smoking history who had recently vaped was diagnosed with thoracic NUT midline carcinoma. The review says the association between e-cigarette use and that diagnosis is very weak.
Two other findings are worth knowing. A 2023 study cited in the 2026 paper found that exclusive vapers had DNA damage in oral cells at levels comparable to smokers. The 2025 review also notes that formaldehyde can damage DNA in the upper airways, which the authors say could potentially contribute to nasopharyngeal (upper throat) and lung cancers. They raise this as a possibility, not a measured result, so throat cancer risk is a good question to raise with a clinician.
Vaping and lung cancer statistics
The 2026 paper cites GLOBOCAN estimates showing lung cancer is the leading cause of cancer mortality worldwide. It also says smoking is estimated to cause 87% of lung cancer deaths in the United States, and that over 1.6 million U.S. middle and high school students reported current e-cigarette use in 2024, making vaping the most widely used tobacco product among youth.
| Statistic | Figure | Source |
|---|---|---|
| Lung cancer rank among cancer deaths worldwide | Leading cause | GLOBOCAN estimates, cited in the 2026 paper |
| Lung cancer deaths in the U.S. estimated due to cigarette smoking | 87% | 2026 paper, citing the 2014 Surgeon General report |
| U.S. middle and high school students currently using e-cigarettes (2024) | Over 1.6 million | 2026 paper |
| People who both vaped and smoked, lung cancer cases vs. controls (under 50) | 7.8% vs. 1.5% | 2026 case-control study |
Can I quit, and which options fit me?
Quitting is the step the research keeps pointing to. Many people try several times before they succeed, according to MyHealthfinder, so a slip is not the end. Each try teaches you something about your triggers and your withdrawal.
As of October 2026, the CDC’s quit-smoking medicines page lists seven FDA-approved quit-smoking medicines and says all have been shown to be safe and effective for adults who smoke cigarettes. The CDC’s smoking cessation fast facts adds that using counseling and medication together provides the best chance of quitting successfully. The Smokefree.gov quit tools page lists free apps and text programs. The table compares the main routes side by side.
| Option | What the research says | Who it may suit | Limits | Cost |
|---|---|---|---|---|
| Quit-smoking medicines (nicotine patch, lozenge, gum, oral inhaler, nasal spray, varenicline, bupropion SR) | The CDC says all seven have been shown to be safe and effective for adults who smoke cigarettes | Adults who smoke cigarettes | The CDC says if you are pregnant, breastfeeding or younger than 18, you should not use these medicines without talking to your doctor. Some ways of using them have not been evaluated or approved by the FDA. | Under the Affordable Care Act, most insurance plans must cover treatment to help people quit smoking. Medicare may also cover services to help people quit smoking at no cost (MyHealthfinder). Coverage for medicines depends on the plan, so check with your insurer or pharmacy. |
| Counseling and quitlines (1-800-QUIT-NOW, text QUITNOW to 333888, quitSTART app) | The CDC lists these as free resources, and counseling combined with medication gives the best chance | Anyone trying to quit, including people who use other tobacco products | Text messaging may carry message and data rates (CDC) | Free. MyHealthfinder says calling 1-800-QUIT-NOW gives free help. |
| Quitting without medicine | The CDC says some strategies, with or without medicines, can help you quit | People who want to start with a plan and check in with a clinician | Withdrawal can be uncomfortable. Symptoms are usually strongest in the first days or weeks (Smokefree.gov). | No product cost |
| E-cigarettes as a step away from cigarettes | MyHealthfinder says the FDA has not approved e-cigarettes as a quit-smoking aid. UK NHS guidance says vapes can help some people gradually let go of smoking. | Adults who smoke and want to weigh options with a clinician | MyHealthfinder says e-cigarette aerosol can contain harmful substances, including heavy metals and chemicals that can cause cancer. The lung cancer question is unresolved. | Prices vary by product. Check current prices directly with the seller or store. |
| Nicotine pouches | The NHS says they are still quite new in the UK, with not yet enough research on how safe they are or how well they help people quit. It says it is usually best to use medicines, nicotine replacement or vapes first. | Best discussed with a clinician first | Long-term safety data are limited, according to the NHS | Check current prices directly with the seller or pharmacy |
Prices and coverage change, so check today’s price directly with your pharmacy, insurer or the seller. The quitline is free, which makes it a low-risk first call.
Cleveland Clinic’s Humberto Choi says “The same tools and strategies that we recommend for people who smoke cigarettes can also help you quit vaping.” MD Anderson’s Ostrin puts the payoff plainly: “Quitting nicotine is going to save you money. It’s going to improve your lung health. It’s better for your heart.” Cleveland Clinic also says withdrawal symptoms are “only temporary” and lessen with each day you’re vape-free. MyHealthfinder lists easier breathing and less coughing and wheezing among the ways people feel better after quitting smoking.
Which symptoms mean you should see a doctor now?
Cleveland Clinic lists these signs: chest pain when you laugh, cough or breathe deeply; a cough that lingers; getting tired or “running out of steam” faster than usual during physical activity; trouble breathing or shortness of breath; unexplained weight loss; and wheezing. If any of these is happening now, see a doctor soon rather than waiting, and tell them that you vape or have vaped. Johns Hopkins adds that a collapsed lung can cause sharp chest or shoulder pain and difficulty breathing.
Questions to take to your clinician
- Given my smoking and vaping history, do I qualify for lung cancer screening? The guide to lung cancer screening questions explains age and smoking history limits.
- Which quit option fits me, and what does my insurance cover?
- Do any of my symptoms need a check now?
- Can you help me plan a quit that fits my daily routine?
Your next step can be small. As the CDC suggests, call 1-800-QUIT-NOW or text QUITNOW to 333888 to talk with a trained counselor about your options. A month from now, you could be talking through your plan with a counselor instead of wondering about it alone.
By SmokersLung.com Respiratory Health Education Team
This article is for general information purposes only and does not constitute medical advice. Consult your doctor or qualified healthcare provider before making changes to your health routine.