Smoking vs vaping: Health risks

Cigarettes, vapes and other tobacco products can all expose your body to harmful chemicals. They can also contain nicotine, the substance that makes tobacco products so addictive.

Nicotine raises your heart rate and blood pressure, constricts blood vessels and can affect your sense of taste and smell. It’s found in cigarettes, cigars, chewing tobacco, snuff, hookah products and many e-cigarettes or vapes.

Vapes are often marketed differently than cigarettes, but they’re not harmless. Many contain nicotine, and the aerosol they produce can expose your lungs to chemicals and metals that may affect your health.

Is vaping worse than smoking?

Neither smoking nor vaping is safe. Trying to choose the “better” option can miss the larger point: Both can harm your health, and both can be addictive.

Smoking sends tar and thousands of chemicals into your lungs. Vaping eliminates smoke, but it still produces an aerosol that can irritate and damage lung tissue. A recent study demonstrated e-cigarette users and smokers have similar risks of cardiovascular disease, stroke, metabolic dysfunction, and oral disease, with asthma and COPD risk lower for vapers than smokers but still substantial. Many vapes also contain nicotine, which can affect the brain and make quitting difficult.

Nicotine is especially concerning for kids, teens and young adults because their brains are still developing. It can affect attention, learning, mood and impulse control.

Does vaping cause cancer?

Researchers are still studying the long-term cancer risks of vaping. A 2025 qualitative carcinogenic risk assessment concluded that nicotine e-cigarettes are "likely to be carcinogenic to humans," citing DNA damage, oxidative stress etc. Rodent studies have shown lung adenocarcinomas from aerosol exposure.  What doctors do know is that vape aerosol can contain chemicals and metals that may irritate the lungs and damage cells.

Because many vaping products are still relatively new, it may take years to fully understand their long-term effects. The safest choice for your lungs is to avoid smoking and vaping. 

What happens when you quit smoking?

When you stop smoking, your body begins to recover. Some changes can happen within hours or days, while others take weeks, months or years.

Your heart rate, blood carbon monoxide levels and blood pressure may begin to improve soon after quitting. Over time, your sense of taste and smell may sharpen, circulation may improve and your lungs may start clearing mucus and irritants more effectively. Heart attack and stroke risks reduce over about 5 years.  

Quitting reduces overall mortality at any age — the largest benefit for those who quit by age 40 (roughly a 90% reduction in risk of dying from smoking-related disease), but meaningful benefit persists even for those quitting after 65.

Can lungs heal after years of smoking?

Your lungs can begin to heal after you stop smoking. Tiny hair-like structures in the airways, called cilia, are paralysed with cigarette smoke, and when when they start working again, it helpsclear mucus and debris from the lungs.

Some damage may be permanent, especially after years of heavy smoking. Conditions such as emphysema do not fully reverse. But quitting at any age can slow further damage and support better lung and heart health. Quitting halts ongoing damage and allows real recovery, but some structural changes and elevated cancer risk are permanent — which is why quitting earlier matters and why never starting is best.

How to quit smoking or vaping

Whether you’re learning how to quit smoking cigarettes or how to quit vaping, no single quit plan works for everyone. Some people stop all at once. Others need medication, counseling or several attempts before they quit.Statistically, The most effective approach combines pharmacotherapy with sustained behavioral support — combined treatment roughly doubles quit rates versus brief advice alone.

Start by talking with your doctor or pharmacist. They can help you understand nicotine replacement options, such as patches, gum or lozenges, as well as prescription medications that may help reduce cravings.

It also helps to know your triggers. You may crave nicotine when you’re stressed, driving, drinking coffee or spending time with people who smoke or vape. Planning for those moments ahead of time can make them easier to manage.

Try to remove cigarettes, vapes, lighters and other reminders from your home, car or bag. Support can also make a difference, whether it comes from a quitline, app, counselor, doctor, friend or family member.

Withdrawal symptoms are common, especially in the first few weeks. Cravings, irritability, trouble sleeping and changes in appetite can happen as your body adjusts. These symptoms can be uncomfortable, but they usually improve with time.

When should you see a doctor?

Talk to your doctor if you want to quit smoking, vaping or using tobacco products. You don’t need to wait until you’ve tried on your own. Medical support can help you understand your options and create a plan that fits your needs.

You should also seek care if you have shortness of breath, chest pain, a long-lasting cough, wheezing or other symptoms that concern you.