Cigar smoking causes cancer. Large prospective studies consistently link it to elevated risks of lung cancer, oral and throat cancers, esophageal cancer, and several other malignancies. The risks climb steeply with the number of cigars smoked per day and the degree to which smoke is inhaled, but even cigar smokers who report never inhaling face meaningfully higher cancer rates than non-smokers. The widespread belief that cigars are a safer indulgence than cigarettes rests on real differences in typical use patterns, not on any absence of harm.
How Strong Is the Overall Cancer Link?
A study following over 350,000 U.S. adults found that exclusive current cigar smokers had about a 60 percent higher risk of dying from a tobacco-related cancer compared to people who never used tobacco. That category included cancers of the bladder, esophagus, larynx, lung, oral cavity, and pancreas. By comparison, exclusive cigarette smokers in the same study had roughly four times the risk of dying from those cancers.1JAMA Internal Medicine. Association of Cigarette, Cigar, and Pipe Use With Mortality Risk in the US Population The gap between cigar and cigarette smokers is real, but so is the gap between cigar smokers and people who don’t smoke at all.
Frequency matters enormously. A separate analysis of U.S. mortality data found that daily cigar smokers had roughly 50 percent higher overall mortality risk than non-users, while non-daily cigar smokers did not show a statistically significant increase in overall death risk.2JNCI Cancer Spectrum. Contemporary Associations of Exclusive Cigarette, Cigar, Pipe, and Smokeless Tobacco Use With Overall and Cause-Specific Mortality in the United States That does not mean occasional cigar smoking is safe. It means that at low frequencies, the added risk is small enough that it can be hard to detect in population studies. When researchers zoom in on specific cancer sites rather than overall mortality, even moderate cigar use shows clear effects.
Lung Cancer Risk
A large European multicenter study found that men who exclusively smoked cigars and cigarillos had about nine times the odds of developing lung cancer compared to never-smokers. Exclusive cigarette smokers in the same study had roughly fifteen times the odds. The researchers found that when they accounted for the total amount of tobacco consumed and the years spent smoking, the dose-response curves for cigars and cigarettes looked remarkably similar.3JNCI: Journal of the National Cancer Institute. Cigar and Pipe Smoking and Lung Cancer Risk: a Multicenter Study From Europe In other words, gram for gram of tobacco burned, cigars are not inherently less carcinogenic than cigarettes when it comes to the lungs.
A long-running U.S. cohort study found that cigar smokers had about twice the risk of lung cancer compared to nonsmokers, with clear dose-response effects: the more cigars per day, the higher the risk.4PubMed. Effect of cigar smoking on the risk of cardiovascular disease, chronic obstructive pulmonary disease, and cancer in men People who smoke both cigarettes and cigars face higher lung cancer incidence than cigarette-only smokers, with one recent analysis estimating their five-year lung cancer incidence at nearly 9 percent compared to about 6 percent for cigarette-only smokers.5British Journal of Cancer. The effect of cigar, cigarillo and pipe smoking on lung cancer risk and screening eligibility
Oral, Throat, and Esophageal Cancers
If there is a cancer site where cigar smoking is especially dangerous, it is the mouth and throat. The reason is straightforward: cigar smoke bathes the oral cavity, pharynx, and larynx in carcinogens regardless of whether the smoker inhales deeply into the lungs. A systematic review of the major U.S. cohort studies found that current cigar smoking was associated with oral cancer mortality ratios ranging from about four to nearly eight times higher than non-smokers. Even cigar smokers who reported no inhalation had about seven times the risk of dying from oral cancer.6PubMed Central. Systematic review of cigar smoking and all cause and smoking related mortality
An Italian-Swiss case-control study specifically examined cancers of the upper digestive tract in men who had never smoked cigarettes or pipes. Current cigar smokers had roughly fifteen times the odds of developing these cancers, and even ever-cigar-smokers who had stopped had markedly elevated risk. The odds were about nine times higher for oral and pharyngeal cancers specifically.7JNCI: Journal of the National Cancer Institute. Cigar Smoking and Cancers of the Upper Digestive Tract
A large prospective study of U.S. men followed over twelve years found that current cigar smokers had roughly five times the risk of dying from lung cancer, four times the risk of dying from oral or pharyngeal cancer, and over ten times the risk of dying from laryngeal cancer, compared to men who had never smoked. The larynx number is striking even by tobacco-research standards.8JNCI: Journal of the National Cancer Institute. Cigar Smoking in Men and Risk of Death From Tobacco-Related Cancers
Cancers Beyond the Lungs and Mouth
A pooled analysis of five large cohort studies looked at cigar and pipe smoking across a broader range of cancer sites. Men who had ever smoked both cigars and pipes showed more than double the risk of liver cancer and about a 20 percent increase in colorectal cancer risk. Pipe-only smokers had a 40 percent higher risk of bladder cancer.9Cancer Prevention Research. Association between Cigar or Pipe Smoking and Cancer Risk in Men: A Pooled Analysis of Five Cohort Studies The bladder connection makes biological sense: carcinogens absorbed into the bloodstream are eventually filtered by the kidneys and concentrated in urine, where they sit in prolonged contact with bladder tissue. Lab work has shown that tobacco smoke condensate is a potent DNA-damaging agent in human bladder cells, causing oxidative stress and the kind of genetic lesions that precede cancer at very low concentrations.10PubMed Central. DNA Damage and Oxidative Stress of Tobacco Smoke Condensate in Human Bladder Epithelial Cells
Why Not Inhaling Doesn’t Make You Safe
The most common defense of cigar smoking is that cigar smokers typically don’t inhale, and this is where people get confused about risk. It is true that cigar smoke is harsher and more alkaline than cigarette smoke, which discourages deep lung inhalation. The pH of cigar smoke is around 8.5, compared to about 5.3 for cigarettes.11Nature. Absorption of Nicotine in Cigarette and Cigar Smoke through the Oral Mucosa That higher pH is also why cigar smoke does not need to be inhaled to deliver nicotine: the alkaline environment means nicotine passes through the lining of the mouth and throat efficiently. The same principle applies to carcinogens. Toxicants don’t require a trip to the lungs to enter the body when they’re being absorbed directly through oral tissue.
The cancer data confirms this. The International Agency for Research on Cancer has noted that cancer risk from cigar smoking is highest in those who inhale, but still two to five times higher in those who report no inhalation compared to never-smokers.5British Journal of Cancer. The effect of cigar, cigarillo and pipe smoking on lung cancer risk and screening eligibility And for oral cancers, as noted above, non-inhaling cigar smokers still showed about seven times the mortality risk. The mouth, tongue, gums, and throat are directly exposed to smoke every time a cigar is held between the lips, regardless of breathing technique.
Does the Type of Cigar Matter?
Not all cigar products carry the same risk profile, and the differences come down to how people actually use them. Premium large cigars tend to be smoked less frequently, are rarely the primary tobacco product for their users, and are puffed less intensely. A study using biomarker data from the Population Assessment of Tobacco and Health (PATH) study found that premium cigar users had lower systemic exposure to toxicants compared to cigarillo and filtered cigar smokers. Premium cigar users tended to be older, less likely to smoke daily, and less likely to inhale deeply.12Nicotine & Tobacco Research. Biomarkers of Toxic Exposure and Oxidative Stress Among U.S. Adult Users of Premium Cigar Versus Other Cigar Subtypes: 2013–2019
Little cigars and cigarillos are a different story. These products are often used as daily substitutes for cigarettes, and their users tend to inhale more deeply and smoke more frequently. A study of dual cigarette-and-cigar users found that cigarillo and large cigar smoking produced significantly higher carbon monoxide exposure per session than little cigar smoking, but that little cigars delivered more nicotine per gram of tobacco consumed.13PubMed Central. Dual Use of Cigarettes, Little Cigars, Cigarillos, and Large Cigars: Smoking Topography and Toxicant Exposure The practical takeaway is that filtered little cigars are functionally similar to cigarettes in how they are smoked and what they deliver, despite being marketed differently.
What Biomarkers Tell Us About Cigar Smokers’ Exposure
You don’t have to wait for a cancer diagnosis to see evidence of harm. Researchers can measure specific breakdown products of carcinogens in blood and urine. An analysis of over a decade of national health survey data found that primary cigar smokers (people who smoked cigars but had never been regular cigarette smokers) had levels of NNAL, a metabolite of a potent lung carcinogen, that were roughly nineteen times higher than those of non-tobacco users. Their cotinine levels, a marker of nicotine exposure, were about 140 times higher than non-users. Cigar smokers also had elevated levels of cadmium and lead.14Cancer Epidemiology, Biomarkers & Prevention. Biomarkers of Exposure among U.S. Cigar Smokers: An Analysis of 1999–2012 National Health and Nutrition Examination Survey (NHANES) Data
NNAL is worth pausing on. It’s a breakdown product of NNK, one of the most studied tobacco-specific nitrosamines. These compounds form during the curing and processing of tobacco when naturally present alkaloids react with nitrosating agents. Once in the body, they are metabolized into reactive compounds that can directly damage DNA, creating the kind of mutations in tumor-suppressor genes and oncogenes that drive cancer.15PubMed Central. From cultivation to cancer: formation of N-nitrosamines and other carcinogens in smokeless tobacco and their mutagenic implications The fact that cigar smokers carry meaningfully elevated levels of this marker is direct biochemical evidence that their bodies are processing known carcinogens, even if many of them never inhale.
How Dose and Duration Change the Picture
A key review published in JAMA summarized the dose-response relationship plainly: as the number of cigars smoked and the amount of smoke inhaled increases, the risk of death from cigar smoking approaches that of cigarette smoking.16JAMA. Health Risks Associated With Cigar Smoking This finding is consistent across studies. Someone who smokes one or two premium cigars a month and doesn’t inhale sits at the low end of the risk spectrum. Someone who smokes several cigars daily and inhales is exposed to a volume of carcinogens comparable to what a cigarette smoker encounters.
Duration of use also matters. Both the U.S. cohort studies and the European multicenter study found clear trends: more years of cigar smoking meant higher cancer risk. This is consistent with how tobacco carcinogens cause harm. DNA damage accumulates over time. The body’s repair mechanisms can handle some level of insult, but persistent exposure eventually overwhelms them. A person who has smoked cigars for thirty years carries a fundamentally different risk than someone who picked up the habit two years ago.
The Misconception Gap
Public perception consistently underestimates cigar-related harm. A study of young adults found that people who had ever smoked large cigars were significantly less likely to agree that they would inhale harmful chemicals while smoking, and significantly less likely to believe they could become addicted, compared to people who had never tried them.17PubMed Central. Cigar Harm Beliefs and Associations with Cigar Use among Young Adults In other words, the people most exposed to the risk were the most likely to minimize it. A separate study found that little cigars and cigarillos evoked more positive feelings among adults compared to cigarettes, and those positive feelings were strongly linked to perceiving them as less harmful.18PubMed Central. Little cigars and cigarillos: Affect and perceived relative harm among U.S. adults, 2015
Several factors feed this perception gap. Cigars are marketed as luxury products, associated with celebration and sophistication rather than addiction. Premium cigars are expensive enough that daily heavy use is rare among their core consumers, which does lower average exposure compared to cigarette smokers. And because cigars produce alkaline smoke that discourages deep inhalation, the experience feels less aggressive on the lungs. All of these things are real, and none of them mean cigar smoke is non-carcinogenic. The alkalinity that discourages inhalation is the same alkalinity that makes the smoke more efficiently absorbed through the mouth.
Secondhand Exposure From Cigar Smoke
A single premium cigar contains as much tobacco as an entire pack of cigarettes, and the burn time can exceed an hour. That means cigar smoking in enclosed or semi-enclosed spaces produces substantial ambient smoke over a long period. Research has examined the volatile emissions from cigar smoke and their potential impact on indoor concentrations of formaldehyde and other pollutants.19E3S Web of Conferences. Volatile Emissions of Cigar Smoke and Their Predicted Impact on Indoor Air Quality While most cigar smoking now takes place outdoors or in designated lounges due to indoor smoking restrictions, anyone sharing the space is exposed to the same classes of carcinogens that affect the smoker.
Oral Precancerous Changes
Cancer doesn’t typically appear without warning. Precancerous lesions in the mouth, called leukoplakia, are white patches on the gums, tongue, or inner cheeks that can be early signs of malignant change. A study comparing smoking types found that cigar smokers actually had fewer leukoplakia lesions than cigarette or pipe smokers, and that pipe smokers or combined pipe-and-cigar smokers had the highest rates.20Oral Surgery, Oral Medicine, Oral Pathology. Influence of cigarette, pipe, and cigar smoking, removable partial dentures, and age on oral leukoplakia This might sound reassuring for cigar smokers, but the comparison group here is other tobacco users, not non-smokers. And the oral cancer mortality data tells a different story: cigar smokers die of oral cancer at rates many times higher than people who don’t smoke at all. Leukoplakia prevalence is only one marker and does not capture the full spectrum of oral cancer pathways.
Quitting and Risk Reduction
Most cessation research focuses on cigarette smokers, but the underlying biology of tobacco-related cancer applies across tobacco products. A long-term study of workers who quit smoking found that lung cancer mortality roughly halved within twenty years of cessation and dropped by about two-thirds after thirty or more years of abstinence.21PubMed Central. Smoking cessation sharply reduced lung cancer mortality in a historical cohort of 3185 Chinese silicotic workers from 1981 to 2014 The benefit did not show up in the first ten years, reinforcing that accumulated DNA damage takes time to manifest and time to repair. For cigar smokers considering quitting, the message is the same as for any tobacco user: the sooner you stop, the more recovery time your body has, but the benefit is measured in decades, not months.
One complicating factor for cigar smokers is that many don’t consider themselves “smokers” in the clinical sense. They may not mention cigar use to a doctor, may not be screened for tobacco-related cancers, and may not be offered cessation resources. If you smoke cigars with any regularity, your physician needs to know about it, because screening recommendations and cardiovascular risk calculations depend on accurate tobacco-use history.