13.4: Tobacco

Figure \(\PageIndex{1}\): (Cigarette Butts; Pawel Czerwinski via Unsplash)

Introduction

Tobacco use remains one of the most significant public health challenges in the United States, despite decades of awareness campaigns and declining smoking rates. Once widely endorsed—even by doctors—tobacco was promoted as a safe and even beneficial product; however, since the landmark 1964 Surgeon General’s Report linking smoking to serious health conditions, public perception and regulation have shifted dramatically. Today, tobacco use is known to cause a wide range of diseases, including cancer, heart disease, and respiratory illnesses, and is the leading preventable cause of death. This overview explores the health effects of tobacco and nicotine products—including cigarettes, smokeless tobacco, and e-cigarettes—the dangers of secondhand smoke, and the benefits and strategies for quitting tobacco use.

Tobacco Use - History

“More doctors smoke Camels than any other cigarette.”

“Reach for a Lucky instead of a sweet.”

“Lucky Strike Cigarettes... are less irritating to sensitive and tender throats than other cigarettes.”

“Lucky Strike- To keep a slender figure, no one can deny.”

“Viceroys filter the smoke! As your dentist, I recommend Viceroys.”

With doctors, dentists, and researchers proclaiming the healthful effects of smoking, smoking rates increased throughout the first half of the 20^th century until 1964. In 1964, the U.S. Public Health Service released the first publication linking cigarette smoking to lung cancer, laryngeal cancer, and chronic bronchitis, which was known as the Surgeon General's Report on Smoking and Health. The report ranked among the top news stories of 1964. A year later, the Federal Cigarette Labeling and Advertising Act of 1965 was passed, requiring cigarette packages to include a health warning. This was followed by the Public Health Cigarette Smoking Act of 1969, which regulated the advertising of tobacco products, including a ban on cigarette advertising in broadcast media. With this report and the two acts, cigarette smoking began to decline (Cummings & Proctor, 2014). ^[35]

It is now well known, documented, and accepted that all forms of tobacco are harmful, and there is no safe level of exposure to smoking. Tobacco use is the leading preventable cause of disease, disability, and death in the United States. According to the Centers for Disease Control and Prevention (CDC), cigarette smoking results in more than 480,000 premature deaths in the United States each year, about 1 in every 5 U.S. deaths. In 2020, 12.5% (nearly 13 of every 100) U.S. adults aged 18 years or older currently smoked cigarettes. This means an estimated 30.8 million adults in the United States currently smoke cigarettes. Over 16 million people live with at least one disease caused by smoking, and 58 million nonsmoking Americans are exposed to secondhand smoke. Some good news is that smoking has declined from 20.9% (nearly 21 of every 100 adults) in 2005 to 12.5% (almost 13 of every 100 adults) in 2020 (Centers for Disease Control and Prevention, 2024). ^[24]

Take a Closer Look

Tobacco smoke contains more than 7,000 chemical components, and at least 250 of these chemicals are harmful to human health. Some of the chemicals, and where they are commonly found besides cigarettes, include:

• Carbon monoxide is emitted from vehicle exhaust
• Nicotine is found in pesticides
• Arsenic and DDT are used in insecticides
• Hydrogen cyanide was used in the gas chambers in World War II, and is currently used in rat poison
• Acetone is a paint stripper and is a component of nail polish remover
• Ammonia is used in household cleaning products
• Butane and methanol are found in fuel
• Cadmium is in car batteries
• Formaldehyde is used as a tissue and specimen preservative, commonly found in science labs (Centers for Disease Control and Prevention, 2024). ^[26]

Secondhand Smoke

The harmful effects of smoking extend far beyond the smoker. Exposure to secondhand smoke can cause serious diseases and death. Since the 1964 Surgeon General’s Report, 2.5 million adults who were nonsmokers died because they breathed secondhand smoke. Exposure to secondhand smoke causes an estimated 41,000 deaths each year among adults in the United States, causing 7,333 annual deaths from lung cancer and 33,951 annual deaths from heart disease (National Center for Chronic Disease Prevention and Health Promotion, 2014). ^[51]

California became a national leader in protecting the public from secondhand smoke by pioneering some of the earliest and most comprehensive clean indoor air laws in the United States. In 1994, California enacted legislation that banned smoking in most workplaces, and by 1998, the law was extended to include all bars, taverns, and restaurants, making it the first state to implement such a broad prohibition (California Department of Public Health, 2017). ^[6] These laws were grounded in evidence showing that secondhand smoke exposure causes lung cancer, heart disease, and other serious health conditions in nonsmokers (U.S. Department of Health and Human Services, 2006). ^[86] California’s approach not only protected employees in the hospitality industry but also set a precedent that influenced many other states and municipalities to adopt similar regulations, contributing to widespread cultural and policy shifts toward smoke-free environments nationwide (Centers for Disease Control and Prevention, 2010). ^[9]

Question

• Tobacco advertisements once promoted cigarettes as healthy or glamorous.
  • How do you think these messages influenced public behavior before scientific evidence about tobacco’s harms was widely known?
• The 1964 Surgeon General’s Report was a turning point in public awareness.
  • Why do you think this report had such a major impact compared to earlier warnings about smoking?

Electronic Cigarettes

Electronic cigarettes, or e-cigarettes, have rapidly gained popularity as an alternative to traditional tobacco products, particularly among youth and adults seeking a perceived safer option. Often referred to as “vapes,” “e-cigs,” or “ENDS” (electronic nicotine delivery systems), these battery-powered devices produce a nicotine-laced aerosol that mimics the act of smoking. While e-cigarettes generally contain fewer harmful chemicals than conventional cigarettes, they are not without risk. The aerosol can include nicotine, heavy metals, and other toxic substances, raising concerns about their safety. Although some view e-cigarettes as a potential smoking cessation tool, they are not FDA-approved for that purpose, and current evidence remains inconclusive.

Figure \(\PageIndex{2}\): (Man in Hoodie Vaping; Nery Zarate via Unsplash)

What are they?

E-cigarettes are battery-operated devices that typically produce a flavored nicotine vapor that looks like tobacco smoke. E-cigarettes are sometimes called “e-cigs,” “vapes,” “e-hookahs,” “vape pens,” and “electronic nicotine delivery systems (ENDS).” Some e-cigarettes look like regular cigarettes, cigars, or pipes. Some look like USB flash drives, pens, and other everyday items.

Are e-cigarettes less harmful than regular cigarettes?

Although e-cigarette vapor does not contain the tar currently responsible for most lung cancer and other lung diseases, that doesn’t mean e-cigarettes are safe. Many studies suggest e-cigarettes and noncombustible tobacco products may be less harmful than combustible cigarettes. However, there is not yet enough evidence to support claims that e-cigarettes and other ENDS are effective tools for quitting smoking.

E-cigarette aerosol generally contains fewer toxic chemicals than the deadly mix of 7,000 chemicals in smoke from regular cigarettes. However, e-cigarette aerosol is not harmless. It can contain harmful and potentially harmful substances, including nicotine, heavy metals like lead, volatile organic compounds, and cancer-causing agents. It is difficult for consumers to know what e-cigarette products contain. For example, some e-cigarettes marketed as containing zero percent nicotine have been found to contain nicotine

The U.S. Food and Drug Administration (FDA) has established rules for e-cigarettes and their liquid solutions to help protect the public from the dangers of tobacco use. Because e-cigarettes contain nicotine derived from tobacco, they are now subject to government regulation as tobacco products, including the requirement that both in-store and online purchasers be at least 18 years of age (Centers for Disease Control and Prevention, 2024). ^[32]

College-Aged Student Use

Vaping has become increasingly common among college-aged students, driven by perceptions that e-cigarettes are less harmful than traditional cigarettes. Research indicates that many students view vaping as a safer alternative to smoking, while also associating it with social acceptance and stress relief (Trumbo & Harper, 2013). ^[85] The flavors, sleek designs, and ease of concealment make e-cigarettes particularly appealing to young adults who are navigating independence and social pressures in college environments. However, this normalization of vaping has raised concerns about nicotine dependence and the potential gateway effect toward other tobacco products.

Patterns of use among college students often reflect both experimentation and habitual behavior. National survey data show that e-cigarette use is highest among young adults aged 18 to 24, with a substantial proportion reporting use within the past 30 days (Centers for Disease Control and Prevention, 2024). ^[18] Unlike older populations, college students tend to vape in social contexts, often sharing devices at parties, in dorms, or while studying. The episodic but frequent nature of this use contributes to a unique pattern of intermittent but heavy exposure, which may increase susceptibility to long-term nicotine addiction (Jones & Hill, 2020). ^[42]

Importantly, patterns of vaping on college campuses are also influenced by broader cultural and policy factors. Universities that implement comprehensive smoke- and vape-free campus policies tend to see lower rates of use, suggesting that institutional environments play a role in shaping student behaviors (American College Health Association, 2022). ^[4] At the same time, ongoing debates around marketing practices and regulation continue to affect student perceptions of harm and acceptability. Understanding these patterns is essential for developing effective prevention and cessation strategies tailored to the college student population, who are at a formative stage of their health behaviors.

Can e-cigarettes help people quit smoking traditional cigarettes?

Because they deliver nicotine without burning tobacco, e-cigarettes are thought by many to be a safer alternative to conventional cigarettes, and some people even think they may help smokers lower nicotine cravings while they are trying to quit smoking. However, e-cigarettes are not currently approved by the FDA as a quit-smoking aid. The U.S. Preventive Services Task Force, a group of health experts that makes recommendations about preventive health care, has concluded that evidence is insufficient to recommend e-cigarettes for smoking cessation in adults.

In a 2021 review of 61 studies focused on the use of e-cigarettes as a tool for quitting, the researchers were moderately confident that nicotine e-cigarettes help more people to stop smoking than nicotine replacement therapy or nicotine-free e-cigarettes; however, more research is needed (Hartmann-Boyce et al, 2021). ^[39]

Smokeless Tobacco

Smokeless tobacco is associated with many health problems. Smokeless tobacco contains cancer-causing agents and nicotine, which is highly addictive. Because young people who use smokeless tobacco can become addicted to nicotine, they may be more likely to also become cigarette smokers later.

Smokeless tobacco comes in three types: Chewing tobacco (loose leaf, plug, or twist, and may come in flavors), Snuff (moist, dry, or in packets), and dissolvables (lozenges, sticks, strips, or orbs).

Dangers of Smokeless Tobacco

• Can lead to nicotine addiction
• Causes cancer of the mouth, esophagus (the passage that connects the throat to the stomach), and pancreas
• Is associated with diseases of the mouth
• Can increase risks for early delivery and stillbirth when used during pregnancy
• Can cause nicotine poisoning in children
• May increase the risk for death from heart disease and stroke (Centers for Disease Control and Prevention, 2024) ^[27]

Question

• E-cigarettes are often marketed as safer than traditional cigarettes.
  • Based on what you’ve read, do you think this perception is accurate?
  • Why or why not?
• Some e-cigarettes have been found to contain nicotine even when labeled “nicotine-free.”
  • What concerns does this raise about consumer safety and regulation?
• If e-cigarettes contain fewer chemicals than traditional cigarettes, why do you think public health experts are still cautious about recommending them?
• What are some reasons why people might choose e-cigarettes over regular cigarettes?
  • Do you think these reasons outweigh the risks?
• In your opinion, should e-cigarettes be promoted as a tool for quitting smoking, or should they be discouraged until more research is available?
  • Explain your reasoning.

Health Effects of Tobacco Use

Smoking leads to disease and disability and harms nearly every organ of the body. Although nicotine is addictive and can be toxic if ingested in high doses, it does not cause cancer; other chemicals are responsible for most of the severe health consequences of tobacco use. Tobacco smoke is a complex mixture of chemicals such as carbon monoxide, tar, formaldehyde, cyanide, and ammonia, many of which are known carcinogens. Carbon monoxide increases the chance of cardiovascular diseases. Tar exposes the user to an increased risk of lung cancer, emphysema, and bronchial disorders. Smoking has also been linked to leukemia, cataracts, and pneumonia. On average, adults who smoke die 10 years earlier than nonsmokers.

Figure \(\PageIndex{3}\): (Doctor Visit; National Cancer Institute on Unsplash)

Smoking and Cancer

Cigarette smoking is responsible for about one-third of all cancer cases, affecting many parts of the body, including the blood (acute myeloid leukemia), bladder, cervix, colon, rectum, esophagus, kidney, renal pelvis, larynx, liver, mouth, throat, pancreas, stomach, trachea, lungs, and bronchi. This means that if no one smoked, one out of every three cancer deaths in the United States could be prevented.

Although smoking increases your risk of almost all cancers, it directly accounts for about 85-90 percent of lung cancer cases, or nearly 9 out of 10 lung cancers are caused by smoking cigarettes. Smokeless tobacco (such as chewing tobacco and snuff) also increases the risk of cancer, especially oral cancers. More people in the United States, both men and women, die from lung cancer than from any other type of cancer. Although the risks of smoking are clearer today than in 1964, smokers have a greater risk for lung cancer today than they did in 1964, even though they smoke fewer cigarettes.

• Quitting smoking lowers the risks for cancers of the lung, mouth, throat, esophagus, and larynx.
• Within 5 years of quitting, your chance of getting cancer of the mouth, throat, esophagus, and bladder is cut in half.
• Ten years after you quit smoking, your risk of dying from lung cancer drops by half (Centers for Disease Control and Prevention, 2024). ^[25]

Smoking and Cardiovascular Disease

In addition to cancer, smoking causes lung diseases such as chronic bronchitis and emphysema, and increases the risk of heart disease, including stroke, heart attack, vascular disease, and aneurysm. One out of every four deaths from Cardiovascular Disease is caused by a person choosing to smoke.

Smoking can:

• Raise triglycerides (a type of fat in your blood)
• Lower “good” cholesterol (HDL)
• Make blood sticky and more likely to clot, which can block blood flow to the heart and brain
• Damage cells that line the blood vessels
• Increase the buildup of plaque (fat, cholesterol, calcium, and other substances) in blood vessels
• Cause thickening and narrowing of blood vessels (Centers for Disease Control and Prevention, 2024) ^[25]

Secondhand Smoke and CVD

Nonsmokers exposed to secondhand smoke at home or work increase their risk of developing heart disease by 25-30 percent and lung cancer by 20-30 percent. Non-smokers exposed to secondhand smoke may experience coughing, overproduction of phlegm, reduced lung function, and respiratory infections, including pneumonia and bronchitis. Breathing secondhand smoke can interfere with the normal functioning of the heart, blood, and vascular systems in ways that increase your risk of having a heart attack. Even briefly breathing secondhand smoke can damage the lining of blood vessels and cause your blood to become stickier. These changes can cause a deadly heart attack.

Each year, about 150,000 – 300,000 children younger than 18 months old experience respiratory tract infections caused by secondhand smoke. Children exposed to secondhand smoke are at an increased risk of ear infections, severe asthma, respiratory infections, and death. More than 100,000 babies have died in the past 50 years from sudden infant death syndrome (SIDS) and other health complications as a result of parental smoking. Children who grow up with parents who smoke are more likely to become smokers, thus placing themselves (and their future families) at risk for the same health problems as their parents when they become adults.

There is no safe level of exposure to tobacco smoke (Centers for Disease Control and Prevention, 2023). ^[11]

Smoking and Your Brain

Cigarettes and other forms of tobacco, including cigars, pipe tobacco, snuff, and chewing tobacco, contain the addictive drug nicotine. Nicotine is readily absorbed into the bloodstream when a tobacco product is chewed, inhaled, or smoked. A typical smoker will take 10 puffs on a cigarette over about 5 minutes while the cigarette is lit. Thus, a person who smokes about 1 pack (25 cigarettes) daily gets 250 “hits” of nicotine each day.

Upon entering the bloodstream, nicotine immediately stimulates the adrenal glands to release the hormone epinephrine (adrenaline). Epinephrine stimulates the central nervous system and increases blood pressure, respiration, and heart rate.

Similar to other addictive drugs like cocaine and heroin, nicotine increases levels of the neurotransmitter dopamine, which affects the brain pathways that control reward and pleasure. For many tobacco users, long-term brain changes induced by continued nicotine exposure result in addiction, a condition of compulsive drug seeking and use, even in the face of negative consequences. Studies suggest that additional compounds in tobacco smoke, such as acetaldehyde, may enhance nicotine’s effects on the brain.

When an addicted user tries to quit, he or she experiences withdrawal symptoms including irritability, attention difficulties, sleep disturbances, increased appetite, and powerful cravings for tobacco. Treatments can help smokers manage these symptoms and improve the likelihood of successfully quitting (Centers for Disease Control and Prevention, 2024). ^[25]

Quitting Smoking

Although quitting smoking can be challenging due to nicotine dependence and the habits associated with tobacco use, the health benefits of smoking cessation are both immediate and profound. Within just 20 minutes of quitting, heart rate and blood pressure begin to drop. Within 12 hours, carbon monoxide levels in the blood return to normal. Over the following weeks and months, circulation improves, lung function increases, and coughing and shortness of breath decrease. Long-term, the risk of developing serious health conditions drops significantly. One year after quitting, the risk of coronary heart disease is about half that of a smoker’s. After 5 to 10 years, the risk of stroke can fall to that of a non-smoker. The risk of cancers, particularly those of the mouth, throat, esophagus, and lungs, also declines with each year of sustained abstinence. Quitting smoking not only enhances life expectancy but also improves quality of life by boosting energy, enhancing taste and smell, and reducing exposure to harmful secondhand smoke for others.

What are the benefits of quitting smoking?

You will see immediate positive health improvements upon the cessation of smoking, these include:

• Within 20 minutes, your heart rate and blood pressure drop.
• After 12 hours, the carbon monoxide level in your blood drops to normal.
• In 2-12 weeks, circulation improves, and lung function increases.
• In 1-9 months, coughing and shortness of breath decrease.
• In 1 year, the risk of coronary heart disease is about half that of a smoker’s.
• In 5 years, stroke risk is reduced to that of a nonsmoker.
• After 10 years, the risk of lung cancer falls to about half that of a smoker, and your risk of cancer of the mouth, throat, esophagus, bladder, cervix, and pancreas decreases.
• After 15 years, the risk of coronary heart disease is that of a nonsmoker.
• People who quit smoking will have an improved sense of smell, and food will taste better (Centers for Disease Control and Prevention, 2023). ^[12]

How does quitting smoking impact life expectancy?

Quitting smoking is widely recognized as one of the most impactful decisions individuals can make to improve their health and quality of life, regardless of age or how long they’ve smoked. The CDC highlights that quitting can reduce the risk of premature death and potentially add up to 10 years to one’s lifespan. It also lowers the likelihood of developing serious health conditions such as cardiovascular diseases, chronic obstructive pulmonary disease (COPD), various cancers, and adverse reproductive outcomes. These benefits extend even to those already diagnosed with diseases like heart disease or COPD, offering significant improvements in both prognosis and daily well‑being (Centers for Disease Control and Prevention, 2023). ^[12]

When it comes to cardiovascular health, quitting smoking yields swift and powerful results. The risk of coronary heart disease declines sharply within one to two years of cessation, while the risk of stroke eventually approaches that of individuals who have never smoked. On the respiratory front, giving up smoking reduces the risk of developing COPD, slows its progression, and alleviates symptoms such as coughing and shortness of breath. Additionally, quitting enhances overall lung function and decreases the incidence of respiratory infections like pneumonia and bronchitis. Perhaps most crucially, cessation cuts the risk of various cancers, including lung, bladder, pancreatic, esophageal, and others, over time, offering measurable, long‑term protective effects (Centers for Disease Control and Prevention, 2023). ^[12]

Quitting smoking also delivers important gains for reproductive and immune health, benefiting both the smoker and those around them. Among pregnant individuals, cessation before or during pregnancy significantly reduces the risk of delivering a low birth weight or small‑for‑gestational‑age baby, and reduces the chance of preterm delivery—supporting healthier outcomes for mother and child. Moreover, by quitting, smokers protect their family, friends, and coworkers from the dangers of secondhand smoke exposure. On the immune‑system front, while smoking detrimentally affects immune function, abstinence allows for gradual recovery: white blood cell counts normalize, healing improves, and the immune system becomes stronger, increasing resistance to infections and promoting overall health (Centers for Disease Control and Prevention, 2023). ^[12]

The body begins recovering rapidly after the last cigarette: heart rate and blood pressure drop within minutes, carbon monoxide levels normalize in a matter of days, and improvements in lung function and circulation follow in the weeks to months that come. Even for those who have smoked heavily for many years, these benefits accumulate, slowly aligning health risks closer to those of non‑smokers. In essence, quitting smoking is not only a life‑saving choice, but also one that empowers healing, reinvigoration, and long‑term health—providing enhanced quality of life at every stage post‑cessation (Centers for Disease Control and Prevention, 2023). ^[12]

Figure \(\PageIndex{4}\): Smoking can be a lifetime habit. (Senior Smoker; Naman Sood on Unsplash)

Does quitting smoking lower the risk of cancer?

Yes. Quitting smoking reduces the risk of developing and dying from cancer. Although it is never too late to get a benefit from quitting, the benefit is strongest among those who quit at a younger age.

The risk of premature death and the chance of developing cancer from smoking depend on many factors, including the number of years a person smokes, the number of cigarettes he or she smokes per day, the age at which he or she began smoking, and whether or not he or she was already ill at the time of quitting. For people who have already developed cancer, quitting smoking reduces the risk of developing a second cancer (Centers for Disease Control and Prevention, 2023). ^[12]

Should someone already diagnosed with cancer quit smoking?

Yes. Cigarette smoking has a profound adverse impact on health outcomes in cancer patients. For patients with some cancers, quitting smoking at the time of diagnosis may reduce the risk of dying by 30 percent to 40 percent. For those having surgery, chemotherapy, or other treatments, quitting smoking helps improve the body’s ability to heal and respond to therapy. It also lowers the risk of pneumonia and respiratory failure. Moreover, quitting smoking may lower the risk of the cancer returning, of dying from the cancer, of a second cancer developing, and of dying from other causes (Centers for Disease Control and Prevention, 2023). ^[12]

Question

• Within minutes of quitting smoking, the body begins to recover.
  • Which of the short-term improvements (e.g., heart rate, blood pressure, carbon monoxide levels) do you think would be most noticeable to someone who has just quit?
• Which long-term health benefits (e.g., reduced risk of stroke, cancer, or heart disease) do you think would most motivate a smoker to quit, and why?

Treatments for Tobacco Addiction

Tobacco addiction is a chronic disease that often requires multiple attempts to quit. Although some smokers can quit without help, many others need assistance. Both behavioral interventions (counseling) and medication can help smokers quit, but the combination of medication with counseling is more effective than either alone.

The U.S. Department of Health and Human Services (HHS) has established a national toll-free quit-line, 800-QUIT-NOW, to serve as an access point for any smoker seeking information and assistance in quitting. NIDA’s scientists are looking at ways to make smoking cessation easier by developing tools to make behavioral support available over the internet or through text-based messaging. In addition, NIDA is developing strategies designed to help vulnerable or hard-to-reach populations quit smoking.

Behavioral Treatments

Behavioral treatments employ a variety of methods to help smokers quit, ranging from self-help materials to counseling. These interventions teach people to recognize high-risk situations and develop coping strategies to deal with them.

Nicotine Replacement Treatments

Nicotine replacement therapies (NRTs) were the first pharmacological treatments approved by the Food and Drug Administration (FDA) for use in smoking cessation therapy. Current FDA-approved NRT products include nicotine chewing gum, the nicotine transdermal patch, nasal sprays, inhalers, and lozenges. NRTs deliver a controlled dose of nicotine to a smoker to relieve withdrawal symptoms during the smoking cessation process. They are most successful when used in combination with behavioral treatments.

Other Medications

Bupropion and varenicline are two FDA-approved non-nicotine medications that have helped people quit smoking. Bupropion, a medication that goes by the trade name Zyban, was approved by the FDA in 1997, and Varenicline tartrate (trade name: Chantix) was approved in 2006. It targets nicotine receptors in the brain, easing withdrawal symptoms and blocking the effects of nicotine if people resume smoking.

Current Treatment Research

Scientists are currently developing new smoking cessation therapies. For example, they are working on a nicotine vaccine, which would block nicotine’s reinforcing effects by causing the immune system to bind to nicotine in the bloodstream, preventing it from reaching the brain. In addition, some medications already in use might work better if they are used together. Scientists are looking for ways to target several relapse symptoms at the same time, like withdrawal, craving, and depression (Centers for Disease Control and Prevention, 2023). ^[15]

Key Points

• Smoking was once widely promoted, even by doctors, until the 1964 Surgeon General’s Report linked smoking to serious diseases. This marked a turning point in public awareness and regulation.
• Tobacco use is the leading preventable cause of death in the U.S., responsible for over 480,000 deaths annually and causing diseases such as cancer, cardiovascular disease, and chronic respiratory conditions.
• Exposure to secondhand smoke is harmful and deadly, contributing to thousands of deaths and health issues annually, particularly among children and nonsmokers.
• E-cigarettes deliver nicotine through vapor and may contain fewer toxins than traditional cigarettes, but they are not harmless and are not FDA-approved for smoking cessation.
• Products like chewing tobacco and snuff still carry serious health risks, including cancers and cardiovascular issues, and may lead to nicotine addiction.
• Nicotine is highly addictive, altering brain chemistry similarly to other drugs like heroin. It stimulates the release of dopamine and adrenaline, reinforcing addiction.
• Quitting smoking yields immediate health benefits, such as improved heart rate and lung function, and significantly lowers risks of cancer, heart disease, and early death.
• People who quit smoking at any age can extend their life expectancy, with those quitting by age 34 gaining up to 10 additional years.
• Effective smoking cessation includes behavioral treatments (e.g., counseling) and pharmacological aids like nicotine replacement therapy (NRT), bupropion, and varenicline.
• Scientists are exploring new approaches like nicotine vaccines and combination therapies to improve long-term quitting success and reduce relapse rates.