Relapse after quitting smoking: What drives cravings and weight gain — and what helps
Most relapses happen in the first week, a craving lasts only a few minutes, and the extra weight after quitting is no reason to keep smoking. What lies behind relapse, cravings and weight gain — and which forms of help studies show actually work.
You made it eleven days. Then comes the barbecue evening with friends, the second beer, someone holds out the pack, and before you can think, you have a cigarette in your hand. The next morning there is mainly one thought: now everything is ruined. At the same time the scales show two kilos more than before you quit, and somewhere in your head a voice whispers that smoking at least kept the weight off.
It is exactly on that morning that many people decide whether a slip turns into a relapse. And this is precisely where numbers help more than good intentions. Research shows: relapses are common and follow a pattern, cravings are brief and can be bridged, and the weight gain is real but considerably less dangerous than continuing to smoke.
We looked at what long-term studies show about the typical course of relapses, what Cochrane reviews have found on relapse prevention, exercise and weight, and what the Swiss quit-smoking platform stopsmoking.ch recommends for everyday life. By the end, you will know when the most dangerous days are, what you can do in the three to five minutes of a craving, and how to put the extra kilos in perspective.
Why is relapse after quitting smoking so common?
Because nicotine is strongly addictive and withdrawal is hardest in the first few days. According to an analysis by Hughes et al. from 2004, most relapses happen within the first eight days. Without help, only 3 to 5 percent remain smoke-free for 6 to 12 months after one attempt.
Hughes, Keely and Naud analysed relapse curves in 2004 in the journal Addiction from people who wanted to quit without treatment — including control groups from studies that received no support. All curves showed the same picture: the largest share of relapses falls in the first eight days. The researchers therefore recommend focusing support especially on the first week.
According to stopsmoking.ch, nicotine reaches the brain within 10 to 20 seconds of each puff and releases neurotransmitters that feel like reward and relaxation. Over time the brain builds more receptors for nicotine. When nicotine is absent, those receptors signal withdrawal symptoms. Relapses are therefore not a character flaw but a biologically well-explained consequence.
How many attempts it takes on average was estimated in 2016 by a Canadian team led by Michael Chaiton in BMJ Open, following 1,277 smokers for up to three years. Depending on the calculation method, they arrived at 6 to over 140 attempts; using the method they consider least biased, they found around 30. Their conclusion: for many people it can take 30 or more attempts. Every attempt that fails is therefore part of the journey.
Why are the first two weeks after quitting so important?
Because they show how things will go. In two studies using nicotine patches, 83 to 97 percent of people who smoked even one cigarette in the second week after quitting were back to smoking after six months. Of those who stayed completely smoke-free in week two, 41 to 46 percent were still smoke-free after six months.
Kenford et al. analysed two studies in 1994 in the journal JAMA, involving 88 and 112 people who smoked 15 or more cigarettes a day and wanted to quit using nicotine patches or placebo patches. Neither the number of cigarettes nor a dependence test predicted who would succeed. What mattered most was something else: whether someone had smoked in the second week after quitting.
Of all those who were smoking again after six months, 74 percent in the patch group and 86 percent in the placebo group had already started again in the first or second week. The researchers therefore recommend seeking close support especially during the first two weeks.
For you this means: plan the first 14 days especially consciously. Decide in advance what you will do instead in typical smoking situations, let people around you know, and use support such as nicotine replacement or a quit-smoking helpline right during this period. And if it does happen during these days, that is a warning signal — not a verdict.
How long does a cigarette craving last?
A single strong craving — called a craving — lasts around three to five minutes according to stopsmoking.ch. Withdrawal symptoms overall begin in less than 24 hours, peak after around three days, and subside over two to four weeks. Individual cravings can still appear long after that, for example in familiar situations.
A craving is the sudden, strong urge for a cigarette. stopsmoking.ch lists triggers including the smell of smoke, smoking habits such as the cigarette with coffee or after a meal, stress, low mood, and things you see. The good news: each individual wave passes after a few minutes, even if it feels endless in the moment.
Withdrawal as a whole lasts longer. Addiction researcher John Hughes reviewed around 120 studies in 2007 and identified irritability, anxiety, low mood, concentration problems, impatience, sleep disturbances and restlessness as confirmed withdrawal symptoms. They peak in the first week and last two to four weeks.
If you note down when your craving comes during these weeks, you will quickly recognise a pattern: certain times of day, places or feelings. That is exactly where you can prepare in advance, rather than being caught off guard each time.
What helps immediately against the urge to smoke?
Exercise demonstrably helps. An analysis of 15 to 17 laboratory studies in 2013 found that even brief physical activity significantly reduced the urge to smoke compared to resting. stopsmoking.ch also advises distracting yourself during the three to five minutes and changing typical smoking situations.
Haasova et al. pooled raw data in 2013 in the journal Addiction from studies in which smokers who were temporarily not smoking did brief exercise while a comparison group did not. In all studies, cravings were lower after exercise than in the comparison group, even with moderate exertion. The researchers describe the evidence as strong.
For long-term smoking cessation the picture is less clear. A Cochrane review by Ussher et al. (2019) with 24 studies and 7,279 people found no clear evidence that exercise programmes on top of quit-smoking support increased success rates after six months; the certainty of the data is low. Exercise is therefore a good tool for the acute moment but does not replace support.
For situations strongly linked to smoking — such as coffee, the end of a meal, boredom or stress — stopsmoking.ch advises finding another activity and consciously addressing conflicts and worries instead of suppressing them with a cigarette. The location is often part of the habit too: someone who always smoked on the balcony after dinner would be better off avoiding it for a while.
Slip or relapse: what is the difference?
A slip is a single cigarette after quitting; a relapse is a return to regular smoking. stopsmoking.ch advises taking a slip seriously and understanding how it happened, but not treating it as failure. Whoever continues directly afterwards has not lost their quit.
Many people think after a single cigarette: it doesn't matter now anyway. Exactly that thought often turns a slip into a relapse. stopsmoking.ch, whose content is managed by the Swiss Cancer League, puts it plainly: a slip is often not yet a relapse, but it can lead to one.
The platform advises treating the slip like a small analysis: how did it happen? Was it alcohol, company, stress or boredom? What would have helped in that moment? With those answers you are better prepared for the next similar evening.
Kenford's data show why this matters: especially in the first two weeks, a single cigarette can be a sign that more support is needed. That is the right moment to call a quit-smoking helpline, talk to a pharmacist about nicotine replacement, or ask your doctor.
What helps prevent a relapse after quitting?
The best-supported approach is medication over a longer period. In a Cochrane review of 81 studies and 69,094 people, extended treatment with varenicline measurably reduced the risk of relapse, as did nicotine replacement in people who had quit without help. For purely behavioural relapse prevention programmes, the review found no clear effect.
Livingstone-Banks et al. reviewed for Cochrane in 2019 what helps people who have already quit to stay smoke-free. Those who continued taking varenicline after a successful treatment were 1.23 times more likely to remain smoke-free (moderate certainty). In people who had quit without help, nicotine replacement increased the chance by a factor of 1.24.
Surprising is the second part of the finding: programmes designed to train skills for dealing with cravings showed no demonstrable effect on relapse in studies with people who had already quit. That does not mean strategies are useless, but that a course alone is evidently not enough.
The practical takeaway for you: if you quit with support, do not stop it too early. Whether longer treatment makes sense for you is something to decide with your doctor or pharmacist — do not change medications on your own.
Why do people gain weight after quitting?
Partly because the body burns less energy without cigarettes. In a metabolic chamber, the daily energy expenditure of 8 smokers smoking 24 cigarettes a day rose by 215 kilocalories — roughly 10 percent — while basal metabolic rate stayed the same. When smoking stops, that extra expenditure disappears. Many people also experience increased appetite.
The most widely cited measurement comes from Switzerland: Hofstetter, Schutz, Jéquier and Wahren had eight healthy smokers spend 24 hours in a metabolic chamber in 1986, once without cigarettes and once with 24 cigarettes. Food and activity were identical. With cigarettes, daily energy expenditure rose from 2,230 to 2,445 kilocalories. Basal metabolic rate — energy consumption at complete rest — barely changed.
The researchers concluded that energy expenditure drops when quitting and thus promotes weight gain. At 24 cigarettes a day that is around 9 kilocalories per cigarette. This sounds small, but it adds up day after day.
Then there is appetite. According to stopsmoking.ch, cigarettes suppress appetite; when they are gone, many people feel hungrier and temporarily crave more sugar — especially in emotionally difficult moments when the cigarette used to help. Weight gain is therefore not a sign of a lack of discipline, but an expected consequence.
How much weight do people gain after quitting?
An average of 4.7 kilograms in the first year, according to a meta-analysis of 62 studies from 2012. Most of it comes in the first three months. The range is wide: 16 percent lost weight, 37 percent gained fewer than 5 kilograms, 34 percent gained 5 to 10 kilograms, and 13 percent gained more than 10 kilograms.
Aubin et al. compiled weight data in BMJ 2012 from 62 studies of people who had remained permanently smoke-free. Without treatment, they gained an average of 1.1 kilograms in the first month, 2.3 after two months, 2.9 after three months, 4.2 after six months, and 4.7 kilograms after one year.
People who quit with medication gained about as much as those who quit without. And even those who were especially worried about weight gain at the start did not gain more than others.
The pattern shows you when you can be especially mindful: the first three months are the period of greatest gain. Knowing this lets you plan ahead instead of being surprised by the scales.
| Time after quitting | average gain |
|---|---|
| 1 month | 1.1 kg |
| 2 months | 2.3 kg |
| 3 months | 2.9 kg |
| 6 months | 4.2 kg |
| 12 months | 4.7 kg |
Source: Aubin et al., BMJ 2012, meta-analysis of 62 studies of people who remained permanently smoke-free. After 12 months, 16 percent had lost weight, 37 percent had gained fewer than 5 kg, 34 percent 5 to 10 kg, and 13 percent more than 10 kg.
What helps against weight gain after quitting?
There is no method that reliably prevents the extra weight long-term, according to a 2021 Cochrane review. Exercise programmes reduced weight after 12 months by around 2 kilograms, with low certainty. The review found no reliable signs that measures against weight gain jeopardise quitting; however, a pure educational session on weight did show a warning signal.
Hartmann-Boyce et al. reviewed for Cochrane 37 studies on programmes against weight gain and 83 further studies on quit-smoking support with possible effects on weight. Their conclusion is honest: for no intervention is there a clinically meaningful long-term effect with moderate certainty.
Some individual findings still stand out. Exercise programmes made little difference at the end of treatment but led to around 2.1 kilograms less after 12 months (3 studies, low certainty). Personal weight coaching helped by around 1.1 kilograms short-term (very low certainty), with no effect detectable after 12 months. Nicotine replacement slowed the gain at end of treatment by around half a kilogram (moderate certainty).
A warning is also embedded in the review: a detailed weight education programme without personal support produced no fewer kilos, and the quit rate was even lower in those two studies. The order therefore matters: smoking first, then weight — and both without diet pressure in the early weeks.
What helps in everyday life is straightforward: regular exercise, which also helps with cravings, and noticing whether sweets are taking over the role the cigarette used to play.
Is weight gain more dangerous than continuing to smoke?
No. In the Framingham study with 3,251 people, those without diabetes who had quit within the past four years had a 53 percent lower cardiovascular risk than smokers, even though they had typically gained around 2.7 kilograms. In three large US cohorts, the mortality risk after quitting was lower in all weight groups than in those who kept smoking.
Clair et al. examined in JAMA 2013 whether the extra kilos after quitting cancel out the benefit for the heart and blood vessels. The result was clear: even after accounting for weight gain, the risk of cardiovascular events in recent non-smokers remained about half that of smokers. A similar trend was seen in people with diabetes, but it was not statistically significant.
Hu et al. analysed three large US cohorts in the New England Journal of Medicine in 2018. Significant weight gain after quitting increased the risk of type 2 diabetes for a few years, peaking 5 to 7 years after quitting. However, the risk of dying from cardiovascular disease was lower in all groups than in those who kept smoking, even with a gain of more than 10 kilograms.
The extra weight is therefore something you can attend to, but not a reason to keep smoking or to start again. If you have diabetes or an elevated diabetes risk, discuss your quit with your doctor so you can monitor weight and blood sugar together.
How the YUTHI app helps you
In the YUTHI app there is no counter that resets to zero after a single cigarette. If you do smoke after quitting, you log it in the smoking cessation section: the cigarette is recorded and deducted from those not smoked, but your smoke-free time keeps running. What counts is the direction.
When a craving hits, tap "Craving". The app records the moment with the time and shows you a four-minute exercise: inhale for four seconds and exhale for six seconds, ten times, a glass of water in small sips, and a brief change of location. After a few days you can see when your craving typically comes, and under "Help & Counselling" you find the free quit-smoking helpline for your country.
The app also keeps track of your weight. From the day after quitting it deducts around 9 kilocalories per cigarette you smoked daily beforehand from your calorie target — up to 215 — based on Hofstetter's measurement. On a day with a slip, the deduction is removed. On the exercise page it calculates how many minutes of brisk walking offset the reduced expenditure, and a note reminds you that a few extra kilos after quitting is not a failure.
What about you: what is your most difficult smoking situation — the morning coffee, the evening beer, or the moment after an argument?
Frequently asked questions
Is everything wasted after one cigarette?
No. According to stopsmoking.ch, a slip is often not yet a relapse. What matters is to continue right away and understand how it happened. Especially in the first two weeks, a slip is a good reason to seek more support.
How long does nicotine withdrawal last?
According to stopsmoking.ch, withdrawal symptoms begin in less than 24 hours, peak after around three days, and subside over two to four weeks. Individual cravings usually last three to five minutes.
Can you actually lose weight after quitting?
Yes, that happens for some people. In Aubin's meta-analysis, 16 percent of people lost weight in the first year after quitting. On average, however, participants gained 4.7 kilograms.
Should I go on a diet right after quitting?
The evidence speaks against tackling both at once under pressure. A pure weight education programme was linked to lower quit rates in two studies. Exercise is a good start, as it also reduces cravings.
Doesn't smoking help with stress?
It feels that way because the cigarette ends the small withdrawal since the last one. In a 2021 Cochrane review, people after quitting had less stress, anxiety and depressive symptoms than those who kept smoking.
How many attempts does it take to quit smoking?
Often many. A Canadian study with 1,277 smokers estimated in 2016 that it can take 30 or more attempts for many people. Every attempt counts as practice for the next.
That was the snapshot. The app turns it into daily support.
Measure every day instead of calculating once: Vito or Vita puts your numbers in context, builds you a weekly plan and speaks up when something stands out.
From November 2026 — first for iPhone, Android follows. Notify me when it launches ↓
Sources
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