Help to stop smoking

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  • Diabetes and smoking

    Diabetes and smoking

    Smoking increases the risk of developing type 2 diabetes. For people who already have diabetes, smoking makes the condition harder to manage and increases the risk of serious complications. However, quitting smoking can make a real difference to both the prevention and management of the disease.

    Does smoking increase the risk of diabetes?

    Yes, research has established that cigarette smoking increases the risk of developing type 2 diabetes. People who smoke are approximately 30–40% more likely to develop the disease than non-smokers. The risk also increases with the number of cigarettes smoked. Even passive smoking is associated with an increased risk of type 2 diabetes.

    The main reason is the chemicals in cigarette smoke, which interferes with the way the body uses insulin. Insulin is a hormone produced by the pancreas that allows glucose (sugar) to move from the blood into the body’s cells, where it is used for energy. When cells become less responsive to insulin, a condition known as insulin resistance develops. Blood sugar levels rise, and the pancreas has to work harder to produce enough insulin.

    The chemicals in cigarette smoke cause inflammation and damage to cells, interfering with the body’s ability to regulate blood sugar. Smoking is also associated with increased abdominal fat, another risk factor for type 2 diabetes.

    The link is not limited to heavy smokers. Even people who smoke relatively few cigarettes have an increased risk.

    Why is smoking particularly dangerous for people who have diabetes?

    Having diabetes already increases the risk of cardiovascular disease, kidney problems, nerve damage and vision loss. Smoking adds to these risks, making the combination particularly harmful.

    One important problem is blood sugar control. The chemicals in cigarette smoke raise blood sugar and make the body less sensitive to insulin. As a result, smokers with diabetes may need more insulin or other medication to keep their glucose levels under control.

    Smoking also damages blood vessels and reduces circulation. This is especially concerning in people with diabetes, who are already more vulnerable to damage to their arteries and small blood vessels.

    The combination of diabetes and smoking substantially increases the risk of heart attack and stroke. It also increases the likelihood of kidney disease and damage to the blood vessels in the eyes, which can eventually lead to blindness.

    Poor circulation is particularly dangerous in the legs and feet. People with diabetes may already have reduced sensation because of nerve damage. When smoking further reduces blood flow, even a small wound or blister can become difficult to heal. Infections and foot ulcers may develop, sometimes leading to amputation.

    Smoking can also worsen diabetic neuropathy, a condition involving damage to the nerves that can cause pain, tingling and numbness, particularly in the feet and legs.

    In short, smoking makes an already serious disease considerably more dangerous.

    What happens when someone with diabetes quits smoking?

    Quitting smoking is one of the most important steps a person with diabetes can take to protect their health. The benefits begin soon after the last cigarette, even in people who have smoked for many years.

    When exposure to smoke stops, the body gradually becomes more responsive to insulin. Blood sugar levels may become easier to control, and some people find that their diabetes medication requirements change.

    Research has found that insulin can become more effective within approximately eight weeks of quitting smoking. Over time, stopping smoking also reduces the additional cardiovascular and vascular risks associated with tobacco use.

    Better circulation can help protect the feet and legs, while reducing the risk of heart disease, stroke and further damage to the kidneys and eyes.

    There is one important point to bear in mind. Some people gain weight after quitting smoking, which can temporarily affect blood sugar levels. The risk of developing type 2 diabetes may also remain elevated for a period after cessation, partly because of weight gain. However, research shows that this risk decreases with time since quitting. The long-term health benefits of stopping smoking are substantial.

    People with diabetes who quit should monitor their blood sugar regularly, particularly during the first weeks and months. Their doctor may need to review their medication or adjust their treatment as their glucose levels change.

    Quitting does not cure diabetes or reverse existing organ damage, but it can make the disease easier to manage and reduce the risk of further complications.

    Please use the Comments field below to share your experience or to suggest improvements to this article.

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    References

    1. Centers for Disease Control and Prevention (CDC). Diabetes and Smoking. Read more.
    2. US Food and Drug Administration (FDA). How Smoking Can Increase Risk for and Affect Diabetes. Read more.
    3. Pan A, Wang Y, Talaei M, Hu FB, Wu T. Relation of active, passive, and quitting smoking with incident type 2 diabetes: a systematic review and meta-analysis. Lancet Diabetes Endocrinol. 2015 Dec;3(12):958-67. https://doi.org/10.1016/s2213-8587(15)00316-2
  • Allen Carr’s Easyway method

    Allen Carr’s Easyway method

    Allen Carr’s Easyway method is one of the best-known approaches to stopping smoking without medication or nicotine replacement products. Its central idea is quite different from conventional smoking cessation programmes: instead of teaching smokers to resist the urge to smoke, it aims to change the way they think about smoking so that they no longer feel the need to smoke. But does it work?

    What is the Easyway method ?

    The method was developed by Allen Carr, a former heavy smoker who quit in 1983. It is best known through his book The Easy Way to Stop Smoking, first published in 1985 and which has sold over 13 million copies, and through group seminars and online courses.

    The approach is based on the idea that smokers continue smoking largely because they believe cigarettes provide pleasure, relieve stress, help them concentrate or offer comfort. According to Carr, these perceived benefits are largely an illusion: smoking mainly relieves the discomfort caused by nicotine withdrawal, creating a cycle of dependence.

    During a seminar, participants are encouraged to question their beliefs about smoking and understand how nicotine addiction works. Rather than relying on willpower or seeing cigarettes as something they must give up, they are encouraged to view quitting as gaining freedom from an addiction. The method also aims to remove the fear of withdrawal, weight gain and life without cigarettes.

    Unlike most conventional programmes, Allen Carr’s method does not routinely use nicotine replacement therapy or medication. Participants are generally encouraged to continue smoking until the end of the session, when they are asked to smoke their last cigarette.

    Is there a scientific basis for the method?

    The method’s explanation of nicotine addiction has some similarities with established psychological concepts. In particular, questioning beliefs about smoking and changing the way a person responds to cravings are recognised elements of cognitive behavioural approaches.

    However, Allen Carr’s method was not developed on the basis of scientifically validated psychological principles, and many experts believe that some of its underlying assumptions are incorrect. For example, the idea that quitting can be entirely free of withdrawal symptoms is not consistent with what is known about nicotine addiction. Many smokers experience cravings, irritability, anxiety, sleep disturbances or difficulty concentrating after stopping.

    What do scientific studies show?

    Despite the method’s popularity, relatively few clinical studies have examined its effectiveness. A systematic review identified only six studies suitable for analysis, including two randomised controlled trials:

    A large British trial, involving 620 smokers, compared a 4 to 6 hour Easyway seminar with a specialist Stop Smoking Service offering behavioural support and nicotine replacement therapy. After six months, the quit rates were 19.4% and 14.8%, respectively. The difference was not statistically significant, meaning that the study could not establish that either approach was more effective.

    In an Irish trial, 300 smokers were randomly assigned to either a in-person, 5 hours single-session Easyway seminar or to the online National Smoking Cessation Service ‘Quit.ie’. The researchers found higher quit rates among participants attending the seminar than among those using the online service. After one year, 22% of the in-person seminar participants had stopped smoking, compared with 11% in the online comparison group.There is, however, one important difference between the two groups that makes them incomparable: a five-hour in-person session, regardless of its content, will inevitably have a greater impact than an online system, especially if participation rates in online activities are low, which was the case in this study.

    Evidence for the book alone is particularly limited. Reading it has not yet been shown convincingly to increase long-term quit rates.

    Should you try Allen Carr’s method?

    Allen Carr’s method emphasis on challenging the perceived benefits of cigarettes may be helpful for some smokers, but claims of exceptionally high success rates are unfounded. Scientific data indicate that the Easyway seminar is no more effective than other in-person methods. Furthermore, the fact that this method emphasizes avoiding nicotine replacement therapies may be counterproductive.

    Nicotine replacement therapy, prescription medications (varenicline, cytisine) in-persdon behavioural support and quitlines have a much larger body of scientific evidence behind them. There is no reason to avoid these treatments.

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    References

    1. Possenti I, Scala M, Lugo A, Clancy L, Keogan S, Gallus S. The effectiveness of Allen Carr’s method for smoking cessation: A systematic review. Tob Prev Cessat. 2023 Sep 29;9:29. https://doi.org/10.18332/tpc/172314
    2. Keogan S, Li S, Clancy L. Allen Carr’s Easyway to Stop Smoking – A randomised clinical trial. Tobacco Control 2019;28:414-419. https://doi.org/10.1136/tobaccocontrol-2018-054243
    3. Frings D, Albery IP, Moss AC, et al. Comparison of Allen Carr’s Easyway programme with a specialist behavioural and pharmacological smoking cessation support service: a randomized controlled trial. Addiction. 2020;115(5):977–985. https://doi.org/10.1111/add.14897
  • Wrinkles, skin health

    Wrinkles, skin health

    You can’t hide what smoking does to your skin. It’s your body’s biggest organ, and it takes a hit with every cigarette. Wrinkles are only part of the story: smoking also changes how your skin heals, how it fights off germs, and how it handles the sun.

    More wrinkles

    Studies keep finding the same thing. Smokers get wrinkles earlier and worse than non-smokers, even when the amount of sun they’ve had is the same. And it adds up, the more you smoke each day, and the longer you’ve been at it, the more the skin ages.

    How smoking ages your skin from the inside

    Your skin stays firm and bouncy thanks to two proteins. Collagen gives it strength and structure. Elastin lets it spring back after you stretch or squeeze it. Smoking attacks both in four main ways:

    • Smoking floods your body with damaging chemicals. Cigarette smoke has thousands of compounds, and many of them create free radicals. These are unstable molecules that damage healthy cells. Your skin normally fights back with antioxidants like vitamins C and E, but smokers use these up fast. With fewer defences, collagen breaks down and your body struggles to make more.
    • Smoking switches on enzymes that eat collagen. In smokers, collagen gets destroyed faster than it’s rebuilt, and the deeper layer of skin slowly gets thinner and weaker.
    • Smoking cuts off the blood supply. Nicotine narrows your blood vessels, and the tiny ones that feed your skin suffer most. Less blood means less oxygen and fewer nutrients, so your skin can’t repair itself properly. This is why some smokers have a dull, greyish tone.
    • Smoking lowers oestrogen in women. Oestrogen helps keep skin thick, moist and full of collagen. Smokers tend to have lower levels, which is one reason female smokers often show more skin ageing than male smokers.

    Smoking plus sun is a bad mix

    Ultraviolet (UV) light from the sun is the biggest outside cause of early skin ageing. It damages the DNA in skin cells, breaks down collagen and elastin, and causes uneven colouring.

    Smoking and sun damage don’t just stack on top of each other. They make each other worse. Both trigger collagen-eating enzymes, and both create free radicals. If you smoke and also spend a lot of time in the sun without protection, your skin is under attack from two sides at once.

    There’s a cancer link too. Smoking isn’t as closely tied to melanoma as sun exposure is, but it does seem to raise the risk of some other skin cancers, especially squamous cell carcinoma. Smoking also weakens the immune system, so your skin may be slower to spot and destroy abnormal cells before they spread.

    Why cuts and wounds heal slowly

    Smokers are much more likely to have problems after surgery. Wounds can split open, get infected, or heal into worse scars. In some cases, smoking is a big enough risk that a surgeon may advise waiting on an optional operation until after the patient quits smoking.

    Here’s why. Nicotine narrows blood vessels, so less oxygen and fewer nutrients reach the wound. Your body needs both to build new collagen. Carbon monoxide from smoke makes it worse. It gets into your blood and takes the place of oxygen on your red blood cells, so they carry less of it around.

    It isn’t only surgery. Everyday cuts and scrapes take longer to heal in smokers. Long-lasting wounds like leg ulcers are more common and harder to treat. Even spots and other skin problems can hang around longer.

    Smoking and skin infections

    Your skin is your first line of defence against germs. It works as a physical barrier, and it has immune cells watching for trouble. Smoking weakens this at several levels.

    Langerhans cells sit in the top layer of your skin and spot invaders. Smokers have fewer of them, and they don’t work as well. That means infections are more likely to get going before your body notices. Smokers get more skin infections, including fungal ones like candidiasis, and they’re more likely to get a bacterial infection after an injury. Poor blood flow, a weaker immune response and slow healing all help germs settle in and stay.

    The good news: your skin can bounce back

    Skin has a real ability to recover once you quit smoking. Blood flow to your skin starts improving within weeks. As your body goes back to making collagen normally, skin quality gets better over time. The biggest changes usually show up in younger people who haven’t smoked for long. Still, plenty of long-term smokers say their skin tone and texture look better within months or years of stopping.

    Some damage, especially deep changes to collagen and elastin, can’t be fully undone. But quitting stops the damage from getting worse and gives your skin its best chance to repair itself. Add sun protection, plenty of water and a diet full of fruit and vegetables, and the difference can be big.

    Every cigarette you don’t smoke is a small win for your skin, and for a face that looks your real age.

    Use the Comments field below to share your experience or to suggest improvements to this article.

    References:

    Akimichi Morita, Tobacco smoke causes premature skin aging,
    Journal of Dermatological Science, Volume 48, Issue 3, 2007,
    Pages 169-175, ISSN 0923-1811, https://doi.org/10.1016/j.jdermsci.2007.06.015.

    Ortiz, A. and Grando, S.A. (2012), Smoking and the skin. International Journal of Dermatology, 51: 250-262. https://doi.org/10.1111/ .1365-4632.2011.05205.x

    Sørensen, L. (2012). Wound Healing and Infection in Surgery: The Pathophysiological Impact of Smoking, Smoking Cessation, and Nicotine Replacement Therapy A Systematic Review. Annals of Surgery, 255(6), 1069–1079. https://doi.org/10.1097/SLA.0b013e31824f632d

  • Carbon monoxide

    Carbon monoxide

    Carbon monoxide (CO) is one of the most harmful gases inhaled when smoking. It is invisible, odorless, and tasteless, yet it has immediate and significant effects on the body.Here is a summary of what you need to know about it.

    What is CO?

    Carbon monoxide is produced whenever carbon-containing materials, such as tobacco, burn incompletely. When a cigarette is lit, it generates CO that is inhaled into the lungs and rapidly passes into the bloodstream. There, it binds strongly to hemoglobin, the molecule responsible for carrying oxygen. This binding forms carboxyhemoglobin, which reduces the blood’s capacity to transport oxygen to tissues and organs.

    Each cigarette causes a measurable rise in carbon monoxide levels. After smoking a single cigarette, carboxyhemoglobin levels in the blood typically increase to around 3 to 9 percent. In people who smoke regularly, especially those consuming a pack per day, these levels often remain between 5 and 10 percent, and can be even higher in heavy smokers. By contrast, non-smokers usually have levels between 0.5 and 1 percent, meaning that smokers may carry five to ten times more carbon monoxide in their blood.

    This difference is also reflected in exhaled air. In non-smokers, exhaled carbon monoxide levels are usually very low, typically around 1 part per million (ppm). In smokers, however, exhaled CO commonly ranges from about 10 to 30 ppm, and can exceed this range depending on how recently and how heavily the person has smoked. These measurements are often used in smoking cessation programs to provide visible feedback on exposure.

    Consequences

    The presence of carbon monoxide in the blood reduces oxygen delivery throughout the body, which has widespread consequences. In the short term, this leads to reduced physical performance, increased breathlessness, headaches, and a higher heart rate as the body attempts to compensate for the lack of oxygen. Over time, the strain on the cardiovascular system contributes to the development of heart disease and stroke. Carbon monoxide also damages blood vessels and accelerates the process of atherosclerosis. In individuals with existing conditions such as angina or chronic obstructive pulmonary disease, the effects can be particularly severe. In pregnant women, carbon monoxide exposure reduces oxygen supply to the fetus, increasing the risk of low birth weight and developmental complications.

    How quickly does carbon monoxide disappear after quitting?

    Within eight hours of the last cigarette, carbon monoxide levels in the blood drop by roughly half. Within 12 to 24 hours, levels return close to those seen in non-smokers. After about 48 hours, carbon monoxide is essentially eliminated from the bloodstream. As this happens, oxygen delivery improves rapidly, and many people begin to notice that breathing becomes easier and energy levels increase within a very short time.

    Please use the Comments field below to share your experience or to suggest improvements to this article.

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    References:

    Alyrene Dorey, Pieter Scheerlinck, Hoanvu Nguyen, Timothy Albertson, Acute and Chronic Carbon Monoxide Toxicity from Tobacco Smoking, Military Medicine, Volume 185, Issue 1-2, January-February 2020, Pages e61–e67, https://doi.org/10.1093/milmed/usz280

  • Insomnia after quitting smoking

    Insomnia after quitting smoking

    For many smokers, the first few nights after quitting can be restless. They fall asleep late, wake up during the night, or get up earlier than usual. Insomnia is one of the most common symptoms of nicotine withdrawal. The good news is that it is temporary. Here is why it happens, how long it lasts, and what can help you overcome it.

    Why nicotine withdrawal disrupts sleep

    Nicotine is a stimulant, and for years the smoker’s brain has adapted to receiving regular doses of it. Nicotine alters several neurotransmitter systems involved in alertness, reward, and sleep regulation, including dopamine, acetylcholine, and norepinephrine.

    When nicotine intake suddenly stops, the brain has to recalibrate. During this adjustment period, sleep can become fragmented. People may take longer to fall asleep and wake frequently. Some report a sense of agitation at night or an unusual level of mental alertness when they would normally be winding down.

    The timeline

    Sleep problems usually appear quickly after the last cigarette. Many people notice them during the first two or three nights of abstinence. The first week is often the most difficult, as nicotine withdrawal symptoms peak during this period.

    By the third and fourth weeks, sleep typically begins to stabilize. The brain’s receptors are gradually adapting to the absence of nicotine, and the body’s stress response settles. For most people, insomnia linked to withdrawal fades within a month, but it may last for as much as 6 months. There are exceptions: heavy smokers or people who already had sleep difficulties may experience more prolonged disturbances.

    Interestingly, long-term studies suggest that former smokers often end up sleeping better than they did while smoking. Once the withdrawal phase passes, the nightly cycle of nicotine stimulation and withdrawal disappears, and sleep becomes more stable.

    Overcoming insomnia

    The most important thing for people experiencing insomnia after quitting smoking is reassurance. The sleeplessness is a symptom of recovery, not a sign that something has gone wrong.

    Simple changes to your evening routine can help. Limiting your caffeine intake after noon reduces the risk of insomnia. Establishing a regular bedtime routine (dim lights, quiet activities, and regular sleep times) helps the body rebuild its internal clock.

    Physical activity during the day also makes a difference. Even moderate exercise, such as a brisk walk, improves sleep quality and reduces withdrawal-related stress. What matters most is consistency rather than intensity.

    Nicotine replacement can help

    Insomnia is mostly driven by nighttime nicotine withdrawal. If the brain has been accustomed to steady levels of nicotine, a sudden overnight absence can trigger restlessness.

    Nicotine medications can ease this transition. Products such as nicotine patches, gum, lozenges, or inhalers are safe, non-addictive and deliver nicotine without the harmful combustion products found in cigarettes. By stabilizing nicotine levels in the body, they reduce the intensity of withdrawal symptoms, including sleep disruption.

    Nicotine patches, which provide a steady dose over many hours, are particularly helpful for some individuals. However, wearing a patch overnight can occasionally lead to vivid dreams or lighter sleep. When that happens, removing the patch before bedtime often solves the problem without compromising daytime craving control.

    Short-acting forms of nicotine replacement, such as gum or lozenges, can also be useful in the evening if cravings or restlessness build up before sleep.

    Nicotine medications do not to replace one dependency with another. They deliver nicotine more slowly and in lower doses than cigarettes, and therefore they are not addictive, but they deliver just enough nicotine to support the brain through a short transition period while it adapts to life without cigarettes.

    Medical options

    If sleep difficulties continue for several weeks and significantly affect daily life, medical advice may be warranted. In some cases, clinicians may suggest temporary sleep aids or behavioral therapies designed specifically for insomnia.

    Another possibility is to use medications such as varenicline , cytisine or bupropion, which target the brain pathways involved in nicotine dependence and attenuate nicotine withdrawal symptoms, including insomnia.

    Please use the Comments field below to share your experience or to suggest improvements to this article.

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    References:

    N. Hu, C. Wang, Y. Liao, Q. Dai, S. Cao, Smoking and incidence of insomnia: a systematic review and meta-analysis of cohort studies, Public Health, Volume 198, 2021, Pages 324-331, ISSN 0033-3506, https://doi.org/10.1016/j.puhe.2021.07.012.

    John R. Hughes, Effects of Abstinence From Tobacco: Valid Symptoms and Time Course, Nicotine & Tobacco Research, Volume 9, Issue 3, March 2007, Pages 315–327, https://doi.org/10.1080/14622200701188919

    Etter, J.-F., Ussher, M. and Hughes, J.R. (2013), A Test of Proposed New Tobacco Withdrawal Symptoms. Addiction, 108: 50-59. https://doi.org/10.1111/j.1360-0443.2012.03981.x

    Andreas Jaehne, Thomas Unbehaun, Bernd Feige, Ulrich C. Lutz, Anil Batra, Dieter Riemann. How smoking affects sleep: A polysomnographical analysis, Sleep Medicine, Volume 13, Issue 10, 2012, Pages 1286-1292, ISSN 1389-9457, https://doi.org/10.1016/j.sleep.2012.06.026.

  • Cigarettes

    Cigarettes

    All you need to know about what is in a cigarette, how it is made, and what is in the cigarette smoke

  • What is in a cigarette?

    What is in a cigarette?

    When you light a cigarette, you inhale much more than just dry tobacco smoke. You come into contact with an extremely sophisticated and meticulously designed chemical delivery system, engineered to maximize addiction and appeal. Understanding the components that make up a cigarette reveals a product whose design prioritizes the effectiveness of nicotine delivery and addictiveness at the expense of consumer safety.

    The Tobacco Blend: Types and Treatment

    A cigarette relies on a mixture of different tobacco types, blended to achieve a specific flavor profile and, crucially, to optimize nicotine delivery. The primary tobaccos used are:

    • Flue-Cured (Virginia) Tobacco: Often high in natural sugars, this tobacco is cured in heated barns, resulting in a milder, slightly sweeter flavor.
    • Burley Tobacco: Air-cured, this tobacco is low in sugar but highly porous. This porosity allows it to readily absorb the various additives and flavorings manufacturers introduce.
    • Oriental Tobacco: Sun-cured, this tobacco offers a highly aromatic and strong flavor, often used in smaller quantities for seasoning the blend.

    Modern manufacturing often employs processes like “reconstituted tobacco” (made from scraps and stems) and “expanded tobacco” (puffed up using gases) to reduce costs and control the filling properties of the cigarette. The real chemical intervention, however, occurs through the use of chemical compounds (e.g. ammonia). These compounds increase the alkalinity (pH) of the smoke, which converts the nicotine within the tobacco into its “freebase” form. This freebase nicotine is vaporized more easily, allowing it to be absorbed rapidly by the lungs, delivering a potent and immediate hit to the brain, a key mechanism that enhances the addictive power of the product.

    Additives: The Secret Ingredients

    Manufacturers incorporate hundreds of different chemical additives, often claiming they enhance flavor or act as humectants to keep the tobacco moist. Yet, many additives serve a more sinister purpose: making the smoke easier to inhale and increasing the bioavailability of nicotine.

    Common additives include:

    • Sugars and Humectants (e.g., glycerol and propylene glycol): These are added to maintain moisture, but when they burn, they create toxic compounds, including acetaldehyde. Acetaldehyde is not only a probable carcinogen but may also enhance nicotine’s addictive properties in the brain.
    • Bronchodilators: Certain additives, like cocoa, act as bronchodilators, slightly relaxing the airways. This allows the smoker to inhale the smoke deeper into the lungs, increasing the amount of surface area available for nicotine absorption.
    • Flavorings (e.g., menthol): Menthol has a cooling, anesthetic effect that masks the harshness and irritation of the smoke, making it easier for new smokers to start and deeper inhalation more comfortable for long-term smokers. This makes menthol cigarettes highly addictive and difficult to quit.

    Nicotine Dosage Control: A Pharmacological Precision

    The tobacco industry’s control over nicotine dosage rivals the precision used by pharmaceutical manufacturers. They don’t simply rely on the natural nicotine content of the tobacco leaf; they manage the entire system to ensure the smoker receives a consistent, addictive dose. This control is achieved by using ammonia, adding nicotine to the tobacco, and altering the physical structure of the cigarette.

    By managing the levels of freebase nicotine and controlling the burn rate, the manufacturers effectively dictate how much nicotine the smoker receives per puff. This level is finely tuned to maintain addiction without immediately overwhelming the user, ensuring long-term product use. They adjust the blend and engineering to create cigarettes with different labeled strengths, but even “light” or “low-tar” versions often deliver the same amount of nicotine, as smokers simply inhale deeper or more frequently to reach their desired nicotine level.

    The Role of Paper and Combustion Regulation

    The paper wrapped around the tobacco is far from a neutral wrapper; it is an active component in regulating combustion and toxin production. Cigarette paper is often treated with chemicals like potassium nitrate to control the burn rate. This allows the cigarette to burn evenly and remain lit, even when not actively puffed, preventing the frustration that might lead a user to extinguish it prematurely. This controlled burn affects the temperature of the smoke, which in turn influences the formation of toxins and the release of nicotine.

    Ventilation Holes: The Deception of “Light” Cigarettes

    In the 1970s and 80s, manufacturers introduced ventilation holes: tiny laser-perforated holes found in the filter paper near the tip. This modification was the core feature of cigarettes marketed as “light” or “low-tar.”

    When the cigarette is placed in a smoking machine for measurement, these holes allow outside air to mix with the smoke, effectively diluting the measured tar and nicotine yield, resulting in the lower numbers printed on the packaging. However, when a human smokes, they can block these ventilation holes with their fingers or lips, or they simply inhale deeper and faster to compensate for the dilution. The net result is that the smoker receives essentially the same dose of tar and nicotine than they would from a regular cigarette, rendering the “light” designation meaningless.

    The Filter: A False Sense of Security

    The cigarette filter, typically made of cellulose acetate, a form of plastic, is widely misunderstood by the public.12 While it does trap some particles of smoke, its primary function is psychological and physical, not protective.

    The filter cools the smoke and provides a firmer structure for the smoker to hold, preventing loose tobacco from entering the mouth. While it captures larger particulate matter, it does virtually nothing to filter out the most dangerous components: the toxic gases (like carbon monoxide) and the vast majority of the microscopic, deeply penetrating fine particles that carry carcinogens into the lungs. The filter provides a potent, yet false, sense of security to the smoker.

    The Environmental Aftermath: Cigarette Butts

    Once a cigarette is finished, the filter becomes a major environmental pollutant. Cigarette butts are the most frequently littered item in the world, with trillions discarded annually. Because they are made of plastic (cellulose acetate), they do not biodegrade rapidly; they simply break down into smaller and smaller pieces of plastic, known as microplastics.

    These littered butts leach toxic chemicals—including nicotine, heavy metals, and various combustion byproducts—into soil and water, harming marine life and contaminating the environment. The pollution caused by these discarded plastic filters represents the final, lingering chemical cost of tobacco use.

    Masking SecondHand Smoke

    Finally, some chemical additives in cigarettes are used to mask the odor of sidestream smoke (the smoke emitted from the tip of the cigarette). This is done to allow smokers to smoke in the presence of nonsmokers without being asked to leave the room, but it increases the health risks associated with secondhand smoke by making it easier for smokers to smoke in the presence of others.

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    References:

    Clive Bates, Gregory Connolly, Martin Jarvis. Tobacco Additives: Cigarette Engineering and Nicotine Addiction. ASH (Action on Smoking and Health), 1999. https://www.academia.edu/8046547/Tobacco_additives_Cigarette_engineering_and_nicotine_addiction

    Michael Rabinoff, Nicholas Caskey, Anthony Rissling, and Candice Park:Pharmacological and Chemical Effects of Cigarette Additives American Journal of Public Health 97, 1981_1991, https://doi.org/10.2105/AJPH.2005.078014

  • Nicotine

    Nicotine

    In this section, you will find several articles explaining everything you need to know about nicotine: a test to help you determine how much nicotine you need, the amount of nicotine in a cigarette, the optimal nicotine concentration for your e-liquids, and the effects of nicotine on health, nicotine salts.

  • Lung cancer

    Lung cancer

    Lung cancer is the leading cause of cancer death in men and women worldwide. The most significant and controllable factor behind this devastating disease is smoking. Understanding the risks, symptoms, and consequences of lung cancer is an important and necessary step in deciding to quit smoking.

    What Causes Lung Cancer?

    The primary cause of lung cancer is exposure to cancer-causing substances (carcinogens), which inflict damage upon the cells lining the lungs.

    Smoking (Cigarettes, Cigars, Pipes) is, by far, the leading risk factor, responsible for about 80% of lung cancer deaths. The risk escalates directly with the total number of years and packs smoked. Carcinogens in tobacco smoke cause immediate and chronic changes to lung tissue; while the body attempts to repair this damage, repeated exposure ultimately causes healthy cells to begin growing out of control.

    Furthermore, breathing in secondhand smoke significantly increases the risk of developing lung cancer, even for individuals who have never smoked. Radon Gas, a naturally occurring radioactive gas released from the breakdown of uranium in soil and rock, is the second-leading cause of lung cancer and the leading cause among non-smokers. It can dangerously accumulate in homes, particularly in basements. Workplace Exposures to substances like asbestos, arsenic, chromium, and nickel compounds can also heighten risk, especially for those who also smoke. Previous radiation therapy or a family history of lung cancer are also acknowledged risk factors.

    Prevalence, Trends, and the Power of Quitting

    While lung cancer remains a major killer, the overall number of new cases and deaths is thankfully decreasing. This positive trend is largely attributed to fewer people smoking or starting to smoke.

    Lung cancer kills more people each year than breast, colon, and prostate cancers combined. The general lifetime risk of developing lung cancer is approximately 1 in 17 for men and 1 in 18 for women; however, for those who smoke, this risk is substantially higher.

    The most compelling statistic is the Quitting Effect: stopping smoking, even after many years, significantly lowers your risk. The risk of developing lung cancer drops by half within 10 to 15 years after quitting. For those diagnosed with Non-Small Cell Lung Cancer (NSCLC), former smokers have a lower chance of dying compared to current smokers, and the longer the duration of cessation prior to diagnosis, the better the survival outcome.

    Recognizing the Symptoms

    It is important to understand that many lung cancers do not cause symptoms until they have progressed to a later stage. Seeing a doctor if you experience any of the following persistent signs is crucial for the possibility of earlier detection:

    • A new cough that does not go away or gets progressively worse over time.
    • Coughing up blood (even a small amount) or rust-colored sputum (phlegm).
    • Chest pain that is often more intense with deep breathing, coughing, or laughing.
    • Persistent shortness of breath or wheezing.
    • Hoarseness.
    • Unexplained weight loss or loss of appetite.
    • A feeling of being very tired or weak.
    • Recurring infections like bronchitis or pneumonia.

    Types of Lung Cancer

    Lung cancer is mainly categorized into two groups, which require different treatment approaches:

    Type of Lung CancerPrevalenceKey Characteristics
    Non-Small Cell Lung Cancer (NSCLC)About 87% of all lung cancers.Grows and spreads more slowly than SCLC. Includes Adenocarcinoma (most common, often found in non-smokers as well), Squamous Cell Carcinoma, and Large Cell Carcinoma.
    Small Cell Lung Cancer (SCLC)About 13% of all lung cancers.Highly linked to heavy smoking; it is rare in never-smokers. It tends to grow and spread very quickly.

    Diagnostic Methods

    If lung cancer is suspected, a combination of tests will be utilized for both diagnosis and staging (determining the extent of the cancer).

    Imaging Tests such as a Chest X-ray or CT (Computed Tomography) Scan are used to identify suspicious areas. Low-Dose CT (LDCT) is the only recommended screening tool for high-risk individuals (those with a long smoking history, current smokers, or those who quit within the last 15 years, usually aged 50–80). A PET (Positron Emission Tomography) Scan is typically used to check for the spread of cancer to other parts of the body (staging).

    A Biopsy is the definitive and only way to confirm a cancer diagnosis. A small sample of tissue is removed using a procedure like a bronchoscopy or a CT-guided needle biopsy. This sample is then meticulously examined under a microscope. Furthermore, Molecular Testing of the biopsy tissue is essential for advanced cases, as it checks for specific gene changes (mutations) that can inform targeted treatment options, particularly for NSCLC.

    Treatment and Prognosis

    Treatment selection depends critically on the type of cancer, the stage at diagnosis, and the patient’s overall health.

    Treatment ModalityDescription
    SurgeryOften used for early-stage NSCLC to remove the tumor (e.g., lobectomy, pneumonectomy). It is rarely a primary treatment for SCLC.
    Radiation TherapyUses high-energy rays to kill cancer cells. It can be used alone, before or after surgery, or in conjunction with chemotherapy.
    ChemotherapyAnti-cancer drugs used to destroy cancer cells throughout the body. This is a primary treatment for SCLC.
    Targeted TherapyDrugs that specifically attack certain gene mutations in cancer cells, often used for advanced NSCLC.
    ImmunotherapyDrugs that stimulate the body’s own immune system to recognize and destroy cancer cells.
    Palliative CareFocuses on managing symptoms and improving the patient’s quality of life, especially in later stages of the disease.

    Survival and the Benefit of Early Detection

    The prognosis for lung cancer is heavily influenced by the stage at which it is found. Early detection drastically improves survival odds. The statistics below are the 5-year relative survival rates (the percentage of people who live for at least 5 years after diagnosis compared to the general population).

    Overall Survival Rates (All Stages, US data)1-Year Survival5-Year Survival
    All Lung Cancer CombinedApprox. 45% (UK data)Approx. 29.7% (US data)
    Survival by Stage at Diagnosis (US SEER Data)5-Year Survival Rate (NSCLC)5-Year Survival Rate (SCLC)
    Localized (confined to the lung)67%34%
    Regional (spread to nearby lymph nodes)40%20%
    Distant (spread to distant organs)12%4%

    The takeaway is clear: catching the cancer when it is Localized—which often occurs through screening for high-risk individuals—results in a significantly better outcome. Quitting smoking today is the single most important action you can take to lower your risk, improve your body’s ability to heal, and increase your chances of a better prognosis if a diagnosis does occur.

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  • How much nicotine is in a cigarette?

    How much nicotine is in a cigarette?

    Nicotine is what keeps you smoking, and it is interesting to know how much nicotine is in a cigarette, how much you inhale, and why cigarettes deliver it so effectively. Understanding this makes it easier to choose the right support when you quit smoking, the right nicotine concentration for your e-liquids, and the right dosage for your nicotine medications

    By Jean-François Etter, professor of public health.

    How much nicotine is in a cigarette and how much do you inhale?

    Most commercial cigarettes contain 10 to 15 mg of nicotine in the tobacco. You don’t absorb all of that. Much of it is destroyed by burning, left in the butt, or lost in the smoke that drifts away between puffs. A smoker absorbs 1 to 2 mg per cigarette. That is enough to create and maintain nicotine addiction.

    Why cigarettes are so addictive

    Speed of delivery is the key factor. When you smoke a cigarette, the inhaled nicotine reaches the brain within about 10 seconds, triggering a release of dopamine that feels rewarding or calming. Nicotine level peaks in the blood after 5 to 8 minutes, then nicotine clears from the body fairly quickly, and levels fall by half within about 90 minutes, and withdrawal symptoms such as irritability, cravings and poor concentration begin to build. The next cigarette relieves them, and the cycle repeats. Over time the brain adapts and comes to expect regular doses.

    Manufacturers have also designed cigarettes to make nicotine delivery fast, stable and reliable, through tobacco blending, chemical additives that make the smoke easier to inhale, and by spraying nicotine on tobacco during manufacture. The amount of nicotine in a commercial cigarette is measured with the same precision as the active ingredients in medications. In fact, a cigarette is a highly sophisticated nicotine delivery device, manufactured almost like a medication.

    “Light”, “mild” and “low-nicotine” cigarettes

    Cigarettes once sold as “light”, “mild” or “low nicotine” (labels now banned in many countries) contain about as much nicotine in the tobacco as regular ones. They produce lower nicotine yields on testing machines because tiny ventilation holes near the filter dilute the smoke, but smokers don’t smoke like machines. Because the brain wants its usual dose, people who smoke these cigarettes tend to compensate by:

    • taking deeper or longer puffs,
    • smoking more cigarettes, and
    • covering the vent holes with their fingers or lips.

    The result is that they get a roughly similar dose of nicotine and the same toxic smoke for regular and “light” cigarettes.

    Genuinely very-low-nicotine cigarettes (VLNC), which contain almost no nicotine in the tobacco, are different. In research trials they have reduced dependence and the number of cigarettes smoked, which is why some governments are considering limits on nicotine content, but this policy is controversial, because some experts think that people will not use VLNC in the long term. VLNC are not widely available, and they are not a safe cigarette either, since the smoke is still harmful.

    Nicotine is addictive, but smoke is what does most of the damage

    Nicotine is most addictive when it is inhaled, and the manufactured cigarette is by far the most addictive of all nicotine-delivery products. Nobody is addicted to the nicotine patch, because it delivers nicotine too slowly. However, even with non-inhaled products, nicotine temporarily raises heart rate, and it should be avoided in pregnancy unless a doctor advises otherwise. But the cancers, lung diseases and heart diseases caused by smoking comes from burning tobacco and inhaling smoke: tar, carbon monoxide and thousands of other chemicals. This is why delivering nicotine without smoke is much safer than smoking, and why it can help you stop smoking.

    What can help you quit smoking?

    If you are addicted to nicotine, it is important to continue using nicotine after you quit smoking in order to avoid withdrawal symptoms and prevent a relapse.

    Nicotine replacement therapy (NRT) in the form of patches, gum, lozenges, tablets, inhalers or sprays is safe and gives you nicotine at a slower, steadier rate than a cigarette, without the smoke. This relieves cravings and withdrawal while you break the habit. Because nicotine is absorbed gradually rather than hitting the brain within seconds, NRT has a much lower potential for dependence than cigarettes, though a small number of people do continue using nicotine gums for longer than planned. Nobody is addicted to the nicotine patch, because of its very slow nicotine delivery.

    • Combination NRT works better. Using a patch for steady background nicotine plus a fast-acting form (gum, lozenge or spray) for sudden cravings improves the chances of quitting compared with a single product.
    • Dose matters. Heavier smokers (for example those who smoke 10 or more cigarettes a day, or light up within 30 minutes of waking) usually need a higher-strength patch or gum. Too little nicotine is a common reason for relapse. A pharmacist or doctor can help you choose the best product and the right dosage.
    • Prescription medicines such as varenicline and cytisine / cytisinicline reduce cravings and the reward from smoking, and in studies they are among the most effective options. Bupropion is another choice. Availability varies by country.
    • Nicotine e-cigarettes have helped many people stop smoking, and recent reviews suggest they are more effective than NRT and as affective as varenicline. They are much less harmful than cigarettes, but not risk-free, and long-term effects are still being studied. They are intended for smokers who want to quit, not for non-smokers. Read our article on the best nicotine concentration in e-liquids, based on your personal needs.
    • Nicotine pouches have been studied less, and rules on their sale differ between countries.
    • Support increases success. Counselling, quitline calls and peer groups help with the habits, routines and emotions linked to smoking, and work well alongside medication.

    Find out how much nicotine you need

    Take our quiz to estimate how much nicotine you inhale (or inhaled) as a smoker, and what dosage of nicotine suits you best.

    What to expect after quitting

    Withdrawal symptoms usually peak within the first weeks and then ease. These include cravings, irritability, trouble sleeping, difficulty concentrating and increased appetite and weight gain. These symptoms are attenuated by nicotine medications. Cravings come in waves that pass, even if you do nothing. Slips happen and are not failure. Many people need more than one attempt, and each attempt teaches you something.

    Talk to a professional if you…

    • are pregnant or breastfeeding,
    • have heart disease, or
    • take regular medication or have a medical condition.

    Most people can safely use NRT, and the risks of continuing to smoke are far greater, but a doctor or pharmacist can tailor advice to you.

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    References:

    Theodoulou A, Chepkin SC, Ye W, Fanshawe TR, Bullen C, Hartmann-Boyce J, Livingstone-Banks J, Hajizadeh A, Lindson N. Different doses, durations and modes of delivery of nicotine replacement therapy for smoking cessation. Cochrane Database of Systematic Reviews 2023, Issue 6. Art. No.: CD013308. https://doi.org/10.1002/14651858.CD013308.pub2

    Djordjevic, M.V., Doran, K. . (2009). Nicotine Content and Delivery Across Tobacco Products. In: Henningfield, J.E., London, E.D., Pogun, S. (eds) Nicotine Psychopharmacology. Handbook of Experimental Pharmacology, vol 192. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-540-69248-5_3

    Djordjevic, M.V., Doran, K. . (2009). Nicotine Content and Delivery Across Tobacco Products. In: Henningfield, J.E., London, E.D., Pogun, S. (eds) Nicotine Psychopharmacology. Handbook of Experimental Pharmacology, vol 192. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-540-69248-5_3

    Martin J. Jarvis, Richard Boreham, Paola Primatesta, Colin Feyerabend, Andrew Bryant, Nicotine Yield From Machine-Smoked Cigarettes and Nicotine Intakes in Smokers: Evidence From a Representative Population Survey, JNCI: Journal of the National Cancer Institute, Volume 93, Issue 2, 17 January 2001, Pages 134–138, https://doi.org/10.1093/jnci/93.2.134

    Malson JL, Sims K, Murty R, et al. Comparison of the nicotine content of tobacco used in bidis and conventional cigarettes. Tobacco Control 2001;10:181-183. https://doi.org/10.1136/tc.10.2.181