Teenagers and parents often search does smoking stunt your growth. The honest answer is more nuanced than the myth. The evidence that smoking makes teenagers shorter is limited, and we could not find a study in the sources used here that shows it for active smoking. The evidence that smoking slows lung growth in the teen years is much stronger, and nicotine is highly addictive for young people. This guide separates what is proven from what is repeated online, without lectures, and ends with free ways to quit.
The short answer: height evidence is weak, lung evidence is stronger
If you are hoping for a simple yes or no on height, the careful answer is “probably not in the way people say, but smoking does interfere with growing bodies in other ways.” Here is the shape of the evidence:
- Height: the sources reviewed here do not show that smoking in the teen years makes people shorter. The one height study we cite looked at passive exposure in younger children, and its authors concluded the small difference came from exposures early in life, not later growth.
- Lungs: a large US cohort found a dose-response relationship between smoking and lower lung function in adolescents, and slower growth of lung function (Gold et al., 1996).
- Bones: a US National Osteoporosis Foundation review concluded that smoking in adolescents may reduce peak bone mass, with a modest evidence grade.
- Brain and addiction: starting early raises the risk of dependence, and animal studies suggest nicotine can induce lasting brain changes in adolescence.
So “stunts your growth” is an overstatement for height, but “harms how your body develops” is fair.
What studies found on height and growth
The question of height is where the internet gets ahead of the science. We looked for evidence that active smoking in adolescence changes adult height, and did not find it in the sources we could verify. That is not proof that there is no effect. It means the claim is not established here, so this article does not make it.
What exists is a study of passive smoke in children. In a longitudinal cohort of 9,273 children aged 6 to 11, researchers found that children whose mothers smoked ten or more cigarettes daily were approximately 0.65 cm shorter than children of non-smokers, and those whose mothers smoked 1 to 9 cigarettes were 0.45 cm shorter. Passive smoking was not correlated with the child’s growth rate. The authors concluded that the association was due to exposures in utero and/or during infancy and the preschool years (Berkey et al., 1984, International Journal of Epidemiology).
That is a small difference, from a different exposure, in a different age group, so it does not tell us what happens when a 15-year-old smokes. It is useful mainly as a reminder to be careful with claims. If a video says nicotine “definitely stunts growth,” ask which study it comes from.
| Claim | What the sources show | Strength |
|---|---|---|
| Smoking makes teens shorter | No source reviewed shows this for active smoking | Not established here |
| Smoking slows lung growth in teens | Dose-response in a 10,060-teen cohort (Gold et al., 1996) | Well supported |
| Smoking may lower peak bone mass | National Osteoporosis Foundation review, evidence grade C | Moderate to limited |
| Starting young raises dependence risk | 80% of smokers begin by 18; risk rises when smoking starts early (Benowitz, 2010) | Well supported |
Lung growth: the effect with the best evidence
Lungs keep growing through the teen years, and smoke gets in the way. In a study published in the New England Journal of Medicine, researchers followed 5,158 boys and 4,902 girls aged 10 to 18 in six US cities, measured every year between 1974 and 1989 (Gold et al., Effects of cigarette smoking on lung function in adolescent boys and girls).
They found a dose-response relation between smoking and lower lung function. Each pack per day was associated with a 3.2% reduction in one airflow measure (FEF25-75) for girls and a 3.5% reduction for boys. Among teens smoking five or more cigarettes a day, FEV1 grew 1.09% slower per year in girls (95% CI 0.70 to 1.47) and 0.20% slower in boys (95% CI -0.16 to 0.56). The boys’ FEV1 result includes zero, so it is not conclusive by itself, but the overall pattern held.
Girls who did not smoke reached a plateau of lung function at age 17 to 18, while girls the same age who smoked had a decline. The authors concluded that cigarette smoking is associated with mild airway obstruction and slowed growth of lung function in adolescents, and that adolescent girls may be more vulnerable than boys. They also note that 71% of people in the United States who smoke tried their first cigarette in adolescence.
In everyday terms, this suggests a teenager who smokes may reach adulthood with less lung function to spare. Our timeline of what happens to your body when you stop smoking shows how quickly the body starts to repair once smoking stops.
Watch: why teens are more vulnerable
This short video from a US health system features a physician explaining why the developing teen brain makes vaping and marijuana a bigger concern, according to the video description.
Bones, brain and nicotine dependence
Peak bone mass
Bones are built up through childhood and adolescence. The National Osteoporosis Foundation’s position statement notes that lifestyle choices influence 20% to 40% of adult peak bone mass. On smoking, its review graded the evidence for a detriment as grade C and said the studies “support the contention that smoking in adolescents may reduce peak bone mass.” It also notes the evidence is limited by methodological challenges, such as separating smoking from physical activity, diet and alcohol, and that even if the effect during adolescence is small, it may become important if it compounds over time (NOF, peak bone mass position statement).
The developing brain and addiction
A review in the New England Journal of Medicine reports that tobacco use typically begins in childhood or adolescence, with 80% of smokers beginning by 18, and that the risk of dependence increases when smoking begins early. It adds that studies of the developing brain in animals suggest nicotine can induce permanent changes that lead to addiction, with greater brain changes in adolescent rats than adult rats (Benowitz, Nicotine addiction). That is animal research, so treat it as a signal, not a human growth chart.
The US National Institute on Drug Abuse explains the mechanism in simple terms: nicotine increases levels of the neurotransmitter dopamine in the brain’s reward circuits, which reinforces the behavior, and repeated exposure alters those circuits and changes other circuits involved in learning, stress and self-control (NIDA, Is nicotine addictive?).
If you want to know how fast dependence can build, read how long it takes to get addicted to nicotine.
Vaping and growth: myths to check
Many posts claim that vaping stunts growth. We did not find evidence in the verified sources that vaping changes height, and we are not going to claim it. What is well supported is that nicotine in vapes is addictive: the US government’s Smokefree Teen site says nicotine is in most vapes and is very addictive (Smokefree Teen, teen.smokefree.gov).
That is reason enough to take vaping seriously without inventing a growth claim. For the numbers on how common it is, see our youth vaping statistics for 2026, and for rules on who can buy what, see legal smoking age by country. If your interest is fitness, our sibling guide on whether smoking affects muscle growth and gains covers training.
Quitting as a teen: free resources
If you smoke or vape and want to stop, you do not need to wait for a perfect moment. The US government’s Smokefree Teen site lists free tools, including a quit-plan builder, the quitSTART app, SmokefreeTXT for Teens, a vaping reality check and a way to speak to an expert (Smokefree Teen, teen.smokefree.gov).
Withdrawal is real, and so is relapse. Treat a slip as information and try again. Our comparison of the best free quit smoking apps and resources can help you choose tools, and a school nurse, doctor or pediatrician can help too.
For parents: how to help without a fight
Parents often arrive here after finding a vape or smelling smoke. The research does not support scare tactics about height. A better approach is to lead with the effects that are well supported, such as lung growth and addiction, and with practical help.
Our guide to helping your teenager quit vaping offers a parent playbook. Keep the conversation short, ask before you advise, and offer to find support together.
Where iQuit fits
iQuit is a free quit-smoking app on Google Play and the App Store. It is a general app for people who want to stop smoking and is not a teen-specific program, so younger users should start with teen-focused resources such as Smokefree Teen and involve a trusted adult or clinician. For people who do use it, the dashboard tracks days smoke-free, cigarettes avoided and money saved, and you can log cravings with their triggers and intensity. When a craving hits, the SOS tools offer breathing exercises, a grounding exercise, craving surfing and a virtual cigarette.
If you slip, streak shields and slip recovery are there to help you restart. iQuit is a support tool and not medical advice.
Ready to stop? Start with a free tool
Track smoke-free days, log cravings and use SOS tools. iQuit is free on Google Play and the App Store.
Download iQuit Free on Google Play
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Frequently Asked Questions
Does smoking stunt your growth?
The evidence for height is limited. The sources reviewed here do not show that active smoking in the teen years makes people shorter. Clearer effects are on lung growth, where a US cohort of 10,060 adolescents found smoking linked to slower growth of lung function (Gold et al., 1996).
Does vaping stunt your growth?
We found no verified evidence that vaping changes height. What is well supported is that nicotine is addictive, and the US government Smokefree Teen site says nicotine is in most vapes and is very addictive. Do not rely on viral growth claims (Smokefree Teen).
How does smoking affect teenagers lungs?
In a US study of 5,158 boys and 4,902 girls aged 10 to 18, each pack per day was linked to a 3.2% to 3.5% reduction in an airflow measure, and growth of lung function slowed. Girls who smoked had a decline at 17 to 18 instead of a plateau (Gold et al., 1996).
Can smoking affect bone growth?
Possibly. The National Osteoporosis Foundation review graded the evidence at C and concluded studies support the contention that smoking in adolescents may reduce peak bone mass. It notes limits in the research and that even a small effect may compound over time (Weaver et al., 2016).
Why is starting to smoke young a problem?
A review in the New England Journal of Medicine reports that 80% of smokers begin by age 18 and that the risk of dependence increases when smoking begins early. Animal studies suggest adolescent brains show greater changes from nicotine than adult brains (Benowitz, 2010).
Does secondhand smoke affect how tall children grow?
One study of 9,273 children aged 6 to 11 found children of mothers smoking 10 or more cigarettes daily were about 0.65 cm shorter, but passive smoking was not linked to growth rate. The authors attributed the difference to exposure in the womb or early childhood (Berkey et al., 1984).
How can a teenager quit smoking or vaping?
The US Smokefree Teen site offers free tools including a quit-plan builder, the quitSTART app and SmokefreeTXT for Teens, plus a way to speak to an expert. A school nurse, doctor or pediatrician can also help. Relapse is common, so treat a slip as information (Smokefree Teen).
