{"id":12786,"date":"2026-11-14T10:00:00","date_gmt":"2026-11-14T09:00:00","guid":{"rendered":"https:\/\/www.medespoir.ch\/blog\/?p=12786"},"modified":"2026-11-14T10:00:00","modified_gmt":"2026-11-14T09:00:00","slug":"maintaining-weight-loss-after-bariatric-surgery-long-term","status":"publish","type":"post","link":"https:\/\/www.medespoir.ch\/blog\/maintaining-weight-loss-after-bariatric-surgery-long-term\/","title":{"rendered":"Keeping the weight off after bariatric surgery: follow-up at 5 and 10 years, exercise, support and relapse"},"content":{"rendered":"<p><strong>In short:<\/strong> Most people keep a large part of their weight loss for ten years and more after bariatric surgery, but some weight regain after the lowest point is normal and a minority regain a lot. The ten-year results of the Swiss SM-BOSS trial, published in 2025, show that sleeve and bypass patients had lost a similar share of their body weight after a decade, but sleeve patients needed a second operation far more often. What protects your result in the long run is not willpower alone: regular follow-up, enough protein, structured meals rather than grazing, strength and endurance exercise, attention to alcohol, psychological support when needed, and acting early when the scales start to move. In Switzerland, the SMOB guidelines expect lifelong follow-up, with yearly blood tests. This guide explains what is normal at five and ten years, what the evidence says about exercise and support groups, and how to respond to a relapse.<\/p>\n<p><em>This article is general information. It does not replace advice from your surgeon, your doctor or your dietitian, who know your history and your test results.<\/em><\/p>\n<p>This guide is about the long term. For the first months after surgery, see our guide to <a href=\"https:\/\/www.medespoir.ch\/blog\/life-after-bariatric-surgery-switzerland\/\">life after bariatric surgery<\/a>. If you are already facing significant weight regain or reflux, read our guide to <a href=\"https:\/\/www.medespoir.ch\/blog\/revision-bariatric-surgery-switzerland-sleeve-to-bypass\/\">revision surgery<\/a>, and for warning signs that need urgent care, our guide to <a href=\"https:\/\/www.medespoir.ch\/blog\/bariatric-surgery-complications-warning-signs-switzerland\/\">complications<\/a>.<\/p>\n<h2 id=\"contents\">Contents<\/h2>\n<ul>\n<li><a href=\"#news\">What the latest studies show<\/a><\/li>\n<li><a href=\"#curve\">The weight curve: what is normal over the years?<\/a><\/li>\n<li><a href=\"#tenyears\">Sleeve or bypass: what happens after ten years?<\/a><\/li>\n<li><a href=\"#followup\">Follow-up at five and ten years<\/a><\/li>\n<li><a href=\"#eating\">Eating to maintain your weight<\/a><\/li>\n<li><a href=\"#activity\">Physical activity: how much and what kind?<\/a><\/li>\n<li><a href=\"#support\">Support groups and psychological help<\/a><\/li>\n<li><a href=\"#relapse\">Recognising a relapse early<\/a><\/li>\n<li><a href=\"#alcohol\">Alcohol and other risks that grow with time<\/a><\/li>\n<li><a href=\"#medicines\">Weight-loss medicines after surgery<\/a><\/li>\n<li><a href=\"#life\">Life events that put your weight at risk<\/a><\/li>\n<li><a href=\"#expat\">Long-term follow-up when you live in Switzerland<\/a><\/li>\n<li><a href=\"#tunisia\">Surgery in Tunisia and follow-up from Switzerland<\/a><\/li>\n<li><a href=\"#checklist\">Your checklist<\/a><\/li>\n<li><a href=\"#faq\">FAQ<\/a><\/li>\n<\/ul>\n<h2 id=\"news\">What the latest studies show<\/h2>\n<p>Several important long-term studies were published in 2025 and 2026. Together, they give a clearer picture of what happens years after the operation, and of what doctors now call a \u00ab\u00a0suboptimal\u00a0\u00bb result.<\/p>\n<h3>What did the Swiss SM-BOSS trial find after ten years?<\/h3>\n<p>It found similar long-term weight loss after a sleeve and after a bypass, but many more second operations after a sleeve. The Swiss Multicenter Bypass or Sleeve Study randomly assigned 217 patients to one or the other operation in four Swiss bariatric centres between 2007 and 2011; its ten-year results were published in <em>JAMA Surgery<\/em> in April 2025. After ten years and beyond, total weight loss did not differ significantly between the groups: about 27.7% of initial body weight after a bypass and 25.5% after a sleeve in patients who kept their original operation. However, 29.9% of sleeve patients had been converted to another operation because of insufficient weight loss or reflux, against 5.5% after a bypass, and new reflux was more common after a sleeve. Complete ten-year follow-up was available for 65.4% of patients, a reminder that even in trials, many people drop out of follow-up over the years.<\/p>\n<h3>How common is significant weight regain after ten years?<\/h3>\n<p>Common enough that you should plan for it. A study from Porto, published in <em>Obesity Facts<\/em> in 2026 (online in November 2025), followed 353 patients for ten years. On average, they had regained 28% of the maximum weight they had lost, and more after a sleeve than after a bypass. Just over half (56.7%) had regained more than a fifth of the weight lost. Interestingly, in this study, weight regain was not significantly associated with the return of type 2 diabetes, high blood pressure or abnormal blood lipids, but the authors stress that its long-term importance still needs to be studied.<\/p>\n<h3>Is there now an agreed definition of weight regain?<\/h3>\n<p>Partly. Until recently, studies used dozens of different definitions: a 2025 review in <em>Obesity Surgery<\/em> of 119 articles found that nearly half did not define weight regain at all. In 2026, an international Delphi consensus of 66 experts, published in <em>Surgery for Obesity and Related Diseases<\/em>, agreed on several points: the preferred term is \u00ab\u00a0suboptimal\u00a0\u00bb response rather than \u00ab\u00a0failure\u00a0\u00bb; the best measure is the percentage of total weight lost; less than 10% of total weight lost at twelve months counts as non-response; and regaining more than 25% of the weight lost, measured from the lowest weight, counts as recurrent weight gain. The experts also agreed, unanimously, that care should be individualised and that it is appropriate for specialists to prescribe anti-obesity medicines.<\/p>\n<h3>Do the new weight-loss injections work after surgery?<\/h3>\n<p>The first pooled data suggest they do. A meta-analysis published in <em>Obesity Surgery<\/em> in December 2025 combined eight retrospective studies with 964 patients who had regained weight after surgery. Patients lost on average about 11% of their weight with semaglutide and about 13.6% with tirzepatide. The studies were not randomised, so the results need confirmation, but they explain why these medicines are increasingly discussed before considering a second operation.<\/p>\n<h3>What about vitamin deficiencies after ten years?<\/h3>\n<p>They are less frequent than many people fear, provided supplements are taken. The ten-year analysis of the Finnish SLEEVEPASS trial, published in the <em>British Journal of Surgery<\/em> in 2025, found that long-term deficiencies were rare and similar after sleeve and bypass, except iron deficiency, which was more common after bypass. Sleeve patients were less likely to keep taking their supplements (71% against 89% after bypass), which shows how easy it is to drift away from the routine once things seem to be going well.<\/p>\n<h2 id=\"curve\">The weight curve: what is normal over the years?<\/h2>\n<p>Weight after bariatric surgery follows a typical curve: rapid loss in the first months, a slowdown, a lowest point (the \u00ab\u00a0nadir\u00a0\u00bb), and then a period of stabilisation in which a modest regain is common. Understanding this curve prevents both panic and complacency.<\/p>\n<h3>When do you reach your lowest weight?<\/h3>\n<p>Usually between one and two years after surgery. Medespoir&rsquo;s <a href=\"https:\/\/www.medespoir.ch\/guide-chirurgie-obesite.php\">obesity surgery guide<\/a> notes that weight loss is fastest in the first three months and then slows progressively, and that a plateau of several weeks during the loss phase is a normal adaptation of the body, not a failure. The lowest point is reached when the body&rsquo;s adaptations catch up with the reduced intake.<\/p>\n<h3>How much regain after the lowest point is normal?<\/h3>\n<p>Some. The 2026 Delphi consensus considered a small rebound from the lowest weight to be a normal physiological response. In the Swedish Obese Subjects (SOS) study, the longest controlled study of bariatric surgery, average weight loss in the surgery group was 23% after two years, 17% after ten years, 16% after fifteen years and 18% after twenty years, while the control group&rsquo;s weight barely changed. In other words, a partial rebound after the first years is typical, and the remaining loss is durable.<\/p>\n<h3>Why does the body push back?<\/h3>\n<p>Because weight loss triggers biological adaptations: appetite hormones change, energy expenditure falls as body weight and muscle mass decrease, and the stomach or pouch may adapt over time. Reviews of weight regain also describe behavioural factors, such as grazing, liquid calories and reduced physical activity, and psychological factors, such as depression or loss of control over eating. Regain is therefore not simply a lack of discipline. It is the result of biology, habits and circumstances acting together, which is why the response must also combine several approaches.<\/p>\n<h3>What is a realistic goal?<\/h3>\n<p>Health and function rather than a precise number. Medespoir&rsquo;s guide puts it plainly: the objective is health and mobility, not a figure on the scales. A sustained weight loss of around a quarter of your initial weight, as seen in SM-BOSS, already has a major impact on diabetes, blood pressure, joint pain and sleep apnoea for many people.<\/p>\n<table>\n<thead>\n<tr>\n<th>Period after surgery<\/th>\n<th>What usually happens<\/th>\n<th>What matters most<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>0 to 3 months<\/td>\n<td>Fastest weight loss, small portions, adaptation of eating<\/td>\n<td>Hydration, protein, supplements, walking<\/td>\n<\/tr>\n<tr>\n<td>3 to 12 months<\/td>\n<td>Continued loss, plateaus of several weeks are common<\/td>\n<td>Structured meals, start of strength training, regular follow-up<\/td>\n<\/tr>\n<tr>\n<td>12 to 24 months<\/td>\n<td>Lowest weight reached in many cases<\/td>\n<td>Building lasting habits; planning maintenance<\/td>\n<\/tr>\n<tr>\n<td>2 to 5 years<\/td>\n<td>Stabilisation; a modest rebound is common<\/td>\n<td>Annual blood tests, activity, early action if weight rises<\/td>\n<\/tr>\n<tr>\n<td>5 to 10 years and beyond<\/td>\n<td>Most people keep a substantial loss; some regain significantly<\/td>\n<td>Lifelong follow-up, supplements, mental health, alcohol awareness<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h2 id=\"tenyears\">Sleeve or bypass: what happens after ten years?<\/h2>\n<p>Ten-year data matter because many people choose their operation based on results at one or two years. The long-term picture is more nuanced.<\/p>\n<h3>Does a bypass keep the weight off better than a sleeve?<\/h3>\n<p>Slightly, according to some measures, but the difference in total weight lost is small. In SM-BOSS, excess BMI loss was higher after bypass in patients who kept their original operation, but the percentage of total weight lost was not significantly different. The bigger difference was the need for a second operation, which was much more frequent after a sleeve, mainly because of reflux or insufficient weight loss. In the Porto study, the average regain was also higher after a sleeve, although the sleeve group was small.<\/p>\n<h3>Which operation causes more long-term deficiencies?<\/h3>\n<p>Both require supplements for life. In SLEEVEPASS, deficiencies at ten years were similar, except iron deficiency, more frequent after a bypass. The Swiss SMOB guidelines require long-term multivitamins, including minerals and trace elements, after a sleeve and a standard bypass, and lifelong supplementation after malabsorptive procedures.<\/p>\n<h3>Does the type of operation change the follow-up schedule?<\/h3>\n<p>Yes. Under the SMOB guidelines, follow-up after a sleeve or a gastric band is planned at one, three, six, nine and twelve months, then yearly or as needed. After a standard (proximal) bypass, it is planned at one, three, six, nine, twelve, eighteen and twenty-four months, then yearly. After malabsorptive procedures, it continues every six months after the second year.<\/p>\n<table>\n<thead>\n<tr>\n<th>Long-term question<\/th>\n<th>Sleeve<\/th>\n<th>Bypass<\/th>\n<th>Source<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>Total weight loss at 10 years<\/td>\n<td>About a quarter of initial weight<\/td>\n<td>Similar, not significantly different<\/td>\n<td>SM-BOSS, JAMA Surgery 2025<\/td>\n<\/tr>\n<tr>\n<td>Conversion to another operation<\/td>\n<td>29.9% of patients<\/td>\n<td>5.5% of patients<\/td>\n<td>SM-BOSS, JAMA Surgery 2025<\/td>\n<\/tr>\n<tr>\n<td>New reflux<\/td>\n<td>More frequent<\/td>\n<td>Less frequent<\/td>\n<td>SM-BOSS, JAMA Surgery 2025<\/td>\n<\/tr>\n<tr>\n<td>Iron deficiency at 10 years<\/td>\n<td>Less frequent<\/td>\n<td>More frequent<\/td>\n<td>SLEEVEPASS, BJS 2025<\/td>\n<\/tr>\n<tr>\n<td>Adherence to supplements at 10 years<\/td>\n<td>Lower<\/td>\n<td>Higher<\/td>\n<td>SLEEVEPASS, BJS 2025<\/td>\n<\/tr>\n<tr>\n<td>Follow-up visits (Switzerland)<\/td>\n<td>1, 3, 6, 9, 12 months, then yearly<\/td>\n<td>1, 3, 6, 9, 12, 18, 24 months, then yearly<\/td>\n<td>SMOB guidelines 2023<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h2 id=\"followup\">Follow-up at five and ten years<\/h2>\n<p>Long-term follow-up is not a formality. It detects deficiencies before they cause symptoms, adapts treatment of diabetes or blood pressure, and spots weight regain while it is still easy to address.<\/p>\n<h3>Is follow-up really needed for life?<\/h3>\n<p>Yes, according to the Swiss guidelines. The SMOB guidelines ask patients to commit in writing to regular, lifelong follow-up within the multidisciplinary bariatric team of a recognised centre. They also require recognised centres to document follow-up of at least 75% of their patients for a minimum of five years. Medespoir&rsquo;s guide is equally direct: the principal cause of failure is interrupting follow-up and returning to old habits.<\/p>\n<h3>Does follow-up actually change the result?<\/h3>\n<p>The evidence suggests it matters most in the first years. A 2022 systematic review and meta-analysis in <em>Obesity Surgery<\/em> found a significant association between attending follow-up in the first three years and weight loss, but could not show an association beyond three years, partly because few studies looked that far. Follow-up after five years serves another purpose as well: preventing deficiencies, bone loss and anaemia, and adjusting treatment for other conditions.<\/p>\n<h3>What should a yearly check include?<\/h3>\n<p>The SMOB guidelines list annual laboratory tests: a full blood count, coagulation (INR), electrolytes, liver and kidney function, albumin, blood sugar and HbA1c, iron status with ferritin, blood lipids, hormones such as parathyroid hormone, and vitamin levels. Your doctor will add or remove tests depending on your operation and history. A good yearly visit also covers:<\/p>\n<ul>\n<li>your weight trend since the last visit, not just today&rsquo;s figure;<\/li>\n<li>how you eat: portions, protein, grazing, drinks;<\/li>\n<li>physical activity and muscle strength;<\/li>\n<li>mood, sleep, stress and alcohol;<\/li>\n<li>symptoms such as reflux, abdominal pain, dizziness after meals or fatigue;<\/li>\n<li>supplements actually taken, not just prescribed;<\/li>\n<li>medicines that may need adjusting, including those whose absorption can change after surgery.<\/li>\n<\/ul>\n<h3>How often should you see a dietitian?<\/h3>\n<p>The SMOB guidelines call for regular consultations with a dietitian who is part of the bariatric team: at least four in the first year, then at least one a year from the second to the fifth year. After five years, many people benefit from a session whenever their weight starts to rise or their life changes significantly.<\/p>\n<h3>Who does the follow-up after five years?<\/h3>\n<p>Usually the bariatric centre, sometimes an affiliated practice. The SMOB guidelines allow follow-up by the family doctor in exceptional cases, provided progress reports and data are sent to the obesity centre for at least five years. In practice, many people end up seeing their general practitioner once a year, with the bariatric team available if a problem arises. What matters is that someone checks the right tests every year and that you know whom to call.<\/p>\n<h3>Which medicines need special attention?<\/h3>\n<p>Some medicines are absorbed differently after bariatric surgery, particularly after procedures with a malabsorptive component. The SMOB guidelines mention that antidepressants, antipsychotics and anticonvulsants may need dose adjustments guided by blood levels. Always tell any new doctor, dentist or pharmacist that you have had bariatric surgery and which operation it was.<\/p>\n<h2 id=\"eating\">Eating to maintain your weight<\/h2>\n<p>The rules of the first months, such as small portions, eating slowly and stopping at the first sign of fullness, remain valid for life. What changes over the years is that you can eat more, and that old habits can return without you noticing.<\/p>\n<h3>Why is protein still so important years later?<\/h3>\n<p>Because it preserves muscle, which protects your metabolism, and because it keeps you full. The American Society for Metabolic and Bariatric Surgery&rsquo;s nutritional guidelines recommend a minimum of about 60 grams of protein a day after surgery, adjusted individually. Medespoir&rsquo;s guide notes that part of the weight lost is lean mass, which physical activity and protein intake help to limit. Practical tip: start each meal with the protein part of your plate.<\/p>\n<h3>What is grazing, and why does it matter?<\/h3>\n<p>Grazing is eating small amounts repeatedly over the day without planned meals, often without real hunger. It fits neatly around a smaller stomach, which is why it is one of the main threats to a good result. An Australian study published in <em>Obesity<\/em> found that grazing was common before surgery and even more frequent after it, and that grazing and uncontrolled eating after surgery were associated with poorer weight loss and more psychological distress. Structuring the day into three meals and one or two planned snacks is one of the most effective protective habits.<\/p>\n<h3>Are liquid calories a problem?<\/h3>\n<p>Yes. Sweet drinks, milky coffee drinks, smoothies, alcohol and ice cream pass through a small stomach easily and do not create lasting fullness. They are a common cause of slow weight regain. Water, unsweetened tea and coffee should remain your everyday drinks, and the habit of not drinking with meals, recommended in Medespoir&rsquo;s guide, keeps space for food.<\/p>\n<h3>Do you need to count calories?<\/h3>\n<p>Not necessarily, but you need a structure. Many people maintain their weight by keeping a few simple rules: planned meals, protein first, vegetables, small plates, no eating in front of screens and no drinking with meals. Writing down what you eat for a week from time to time, or using an app, helps to spot drift, such as portions that have grown or snacks that have crept in.<\/p>\n<h3>How do you manage Swiss social life?<\/h3>\n<p>By planning rather than avoiding. Raclette, fondue, the ap\u00e9ro and long Sunday brunches are part of life in Switzerland. Eating the protein part first, choosing a small portion, avoiding bread and drinks with the meal, and not arriving starving all help. Our guide to <a href=\"https:\/\/www.medespoir.ch\/blog\/social-life-work-alcohol-after-bariatric-surgery\/\">social life after bariatric surgery<\/a> has more practical tips.<\/p>\n<h2 id=\"activity\">Physical activity: how much and what kind?<\/h2>\n<p>Physical activity does not replace the operation, but it is one of the strongest allies of long-term success, especially for muscle, fitness and mood.<\/p>\n<h3>Does exercise really help after bariatric surgery?<\/h3>\n<p>Yes, although the extra weight loss is modest. A systematic review and meta-analysis published in <em>Obesity Reviews<\/em> in 2021, by a European group that included researchers from Geneva University Hospitals, analysed controlled trials of exercise training after bariatric surgery. Compared with no structured exercise, training led to a small additional weight loss (about 1.8 kg on average), more fat loss, and clear improvements in fitness and muscle strength. Preliminary evidence also suggested benefits for bone density and for weight maintenance after the programme ended.<\/p>\n<h3>How much activity should you aim for?<\/h3>\n<p>The World Health Organization recommends that adults do at least 150 to 300 minutes of moderate-intensity aerobic activity a week, or an equivalent amount of vigorous activity, plus muscle-strengthening activities on two or more days a week. For weight maintenance, many people need to be at the upper end of this range. If you are starting from a low level, build up gradually with your doctor&rsquo;s agreement.<\/p>\n<h3>Why is strength training so important?<\/h3>\n<p>Because muscle is what you most want to keep. Rapid weight loss reduces muscle as well as fat, and less muscle means lower energy expenditure and less strength in daily life. Resistance exercise two or three times a week, with weights, machines, bands or body weight, helps preserve muscle and bone. Medespoir&rsquo;s guide notes that strength training helps considerably once healing is complete.<\/p>\n<h3>Which activities suit life in Switzerland?<\/h3>\n<p>The best activity is the one you will keep doing. Walking and hiking, cycling, swimming in lakes or pools, Nordic walking, cross-country skiing and fitness classes are all accessible across the country. Building activity into daily life, such as walking to the station or taking the stairs, counts too. Many people find that joining a club, a walking group or a regular class with colleagues makes it easier to stay active through the winter months.<\/p>\n<h3>What if joint pain or loose skin hold you back?<\/h3>\n<p>Adapt rather than stop. Swimming, aqua-fitness and cycling are gentle on joints. A physiotherapist can design a programme around knee or back problems. Excess skin after major weight loss can make some activities uncomfortable; supportive sportswear helps, and reconstructive surgery can be considered once weight has been stable, usually beyond the first year according to Medespoir&rsquo;s guide.<\/p>\n<p><strong>Thinking about bariatric surgery, or about how follow-up would work from Switzerland?<\/strong> Request a <a href=\"https:\/\/www.medespoir.ch\/devis.php\">free, personalised quote<\/a>. Treatment in Tunisia is significantly cheaper than in Switzerland; the exact price is given in the quote, sent within 48 hours.<\/p>\n<h2 id=\"support\">Support groups and psychological help<\/h2>\n<p>The operation changes the stomach, not the reasons why people eat. Emotional eating, stress, low mood and body image issues often resurface once the first rapid phase is over.<\/p>\n<h3>Do support groups help you keep the weight off?<\/h3>\n<p>The evidence points in that direction. A systematic review published in <em>Obesity Reviews<\/em> in 2011 found that all five studies examining support groups after bariatric surgery reported a positive association between attendance and weight loss. A later study from the Hospital Cl\u00ednic in Barcelona, published in <em>Obesity Surgery<\/em> in 2020, followed 531 patients and found that the number of support-group sessions attended in the first year predicted weight loss at one year, and that attendance in years two to five was linked to better weight loss at five years. These are associations rather than proof of cause, since motivated people may be more likely to attend, but they support the advice to stay connected.<\/p>\n<h3>Where can you find a support group in Switzerland?<\/h3>\n<p>Ask your bariatric centre first: many run their own groups or information evenings. The Swiss Obesity Foundation (SAPS) lists self-help groups on its website, and Selbsthilfe Schweiz, the national self-help organisation, helps people find groups by topic and region. Most groups meet in German or French; English-speaking expats sometimes join online communities or groups run by international clinics, but check that any online group is moderated and does not spread unsafe advice.<\/p>\n<h3>Is psychological therapy useful even if weight is stable?<\/h3>\n<p>Yes, if eating problems or distress persist. A randomised trial in Canada, published in <em>JAMA Network Open<\/em> in 2023, tested six weekly sessions of telephone-based cognitive behavioural therapy one year after surgery. It did not change weight in the short term, but it significantly reduced binge eating, emotional eating, depression and anxiety. Since these factors are linked to long-term weight regain, treating them early is worthwhile in its own right.<\/p>\n<h3>What signs suggest you should talk to someone?<\/h3>\n<ul>\n<li>Eating in secret, or feeling a loss of control over eating.<\/li>\n<li>Grazing all day, or eating in response to emotions rather than hunger.<\/li>\n<li>Low mood, anxiety or loss of interest lasting more than two weeks.<\/li>\n<li>Drinking more alcohol than before, or using it to cope.<\/li>\n<li>Strong dissatisfaction with your body despite weight loss, or fear of regaining that dominates daily life.<\/li>\n<li>Vomiting on purpose or very restrictive eating.<\/li>\n<\/ul>\n<p>Your family doctor can refer you to a psychologist or psychiatrist; psychotherapy prescribed by a doctor can be covered by basic health insurance under the Swiss rules, subject to your deductible and co-payment. In a crisis, the Swiss helpline La Main Tendue \/ Die Dargebotene Hand is available on 143.<\/p>\n<h2 id=\"relapse\">Recognising a relapse early<\/h2>\n<p>Weight regain is easier to reverse when it is small. The challenge is that it often starts quietly, over months, while life is busy.<\/p>\n<h3>What are the early signs?<\/h3>\n<ul>\n<li>Your weight is a few kilos above your stable level for several weeks.<\/li>\n<li>You can eat noticeably larger portions than a year ago.<\/li>\n<li>Meals have become irregular and snacking has increased.<\/li>\n<li>You have stopped taking supplements or missed your annual check-up.<\/li>\n<li>Activity has dropped after an injury, a new job or a move.<\/li>\n<li>Sweet drinks, alcohol or desserts have returned to daily life.<\/li>\n<\/ul>\n<h3>Should you weigh yourself regularly?<\/h3>\n<p>For many people, yes. Regular self-weighing, for example once a week at the same time of day, helps you notice a trend before it becomes large. Agree with your team on a personal threshold, for instance a number of kilos above your stable weight, at which you will contact them rather than wait for the next annual appointment. If weighing causes anxiety or obsessive behaviour, discuss an alternative with your team.<\/p>\n<h3>What should you do when weight starts to rise?<\/h3>\n<ol>\n<li>Go back to basics for two to four weeks: three planned meals, protein first, no drinking with meals, no grazing.<\/li>\n<li>Write down what you eat and drink for a week to identify the drift.<\/li>\n<li>Increase daily activity and add strength training.<\/li>\n<li>Book an appointment with your dietitian or bariatric team, without waiting for the next routine visit.<\/li>\n<li>Ask for blood tests if you feel tired, as deficiencies or thyroid problems can play a role.<\/li>\n<li>Discuss whether psychological support or medication would help.<\/li>\n<li>If symptoms such as reflux, pain or vomiting appear, ask whether an examination of the stomach or pouch is needed.<\/li>\n<\/ol>\n<h3>Can you recover after regaining weight?<\/h3>\n<p>Often, yes, especially if you act early. Medespoir&rsquo;s guide answers this question directly: by resuming support early, recovery is often possible. Options range from structured dietary and behavioural support to medication and, in selected cases, a revision operation, which our <a href=\"https:\/\/www.medespoir.ch\/blog\/revision-bariatric-surgery-switzerland-sleeve-to-bypass\/\">revision surgery guide<\/a> covers in detail.<\/p>\n<h2 id=\"alcohol\">Alcohol and other risks that grow with time<\/h2>\n<p>Some risks appear or increase years after surgery. Knowing them helps you protect both your weight and your health.<\/p>\n<h3>Why is alcohol riskier after a bypass?<\/h3>\n<p>After a bypass, alcohol reaches the bloodstream faster and peak levels are higher, so the same drink has a stronger effect. Over the long term, this appears to increase the risk of problematic drinking. The latest follow-up of the Swedish Obese Subjects study, published in the <em>British Journal of Surgery<\/em> in October 2025 with a median follow-up of 25 years, found that gastric bypass patients had about five times the risk of alcohol use disorder compared with people receiving usual obesity care, and a higher risk of alcohol-related death. The authors call for risk assessment before surgery, monitoring afterwards and access to targeted treatment.<\/p>\n<h3>What does this mean in practice?<\/h3>\n<ul>\n<li>Drink less than before surgery, and never on an empty stomach.<\/li>\n<li>Do not drive after even small amounts.<\/li>\n<li>Be honest with yourself if alcohol has become a way to cope, and talk to your doctor.<\/li>\n<li>Remember that alcohol also brings liquid calories that undermine weight maintenance.<\/li>\n<\/ul>\n<h3>What other long-term risks should you know?<\/h3>\n<p>Anaemia and iron deficiency, especially after a bypass and in women who menstruate; vitamin B12 deficiency; vitamin D and calcium deficiency with a risk of bone loss; reflux after a sleeve; and, after a bypass, symptoms such as dizziness or sweating after meals that can be signs of dumping or low blood sugar. These are covered in our guide to <a href=\"https:\/\/www.medespoir.ch\/blog\/bariatric-surgery-complications-warning-signs-switzerland\/\">complications and warning signs<\/a>. Annual blood tests and continued supplements prevent most nutritional problems.<\/p>\n<h2 id=\"medicines\">Weight-loss medicines after surgery<\/h2>\n<p>The arrival of GLP-1-based medicines has changed how weight regain after surgery is managed. They are not a substitute for the habits described above, but they can be a useful tool.<\/p>\n<h3>Which medicines are used after bariatric surgery?<\/h3>\n<p>Mainly semaglutide and tirzepatide, and previously liraglutide. A randomised trial from University College London, BARI-OPTIMISE, published in <em>JAMA Surgery<\/em> in 2023, gave liraglutide 3 mg or placebo to 70 patients with poor weight loss after surgery: after 24 weeks, weight fell by 8.8% with liraglutide and by 0.5% with placebo, with mostly digestive side effects. The 2025 meta-analysis mentioned above suggests that semaglutide and tirzepatide are also effective in patients who regain weight, possibly with a larger effect for tirzepatide.<\/p>\n<h3>Are these medicines reimbursed in Switzerland?<\/h3>\n<p>Under strict conditions. Wegovy (semaglutide) has been on the Swiss list of reimbursed medicines since 1 March 2024 and Mounjaro (tirzepatide) since 1 January 2026, according to a position paper by the Swiss Association of Dietitians (SVDE) and the Swiss Obesity Alliance (ALLOB) dated 31 January 2026. Reimbursement depends on the conditions set out in the official limitation, including prescription by qualified doctors and nutritional counselling. Ask your doctor whether you qualify after bariatric surgery, and never buy these medicines outside a pharmacy, as counterfeits circulate online.<\/p>\n<h3>Do you have to take them for life?<\/h3>\n<p>Not necessarily, but their effect generally stops when treatment stops, as Medespoir&rsquo;s guide notes. They are best seen as part of a long-term plan agreed with your team, alongside diet, activity and follow-up, rather than as a short fix.<\/p>\n<h2 id=\"life\">Life events that put your weight at risk<\/h2>\n<p>Weight regain often follows a change in life rather than a change in motivation. Anticipating these moments makes a difference.<\/p>\n<h3>Which situations are most often linked to regain?<\/h3>\n<ul>\n<li><strong>A new job or long working hours<\/strong>, with irregular meals and less time for exercise.<\/li>\n<li><strong>Moving country or canton<\/strong>, losing your doctor, dietitian and routines.<\/li>\n<li><strong>Pregnancy and the months after birth<\/strong>, which need planning with your team; Medespoir has a page on <a href=\"https:\/\/www.medespoir.ch\/grossesse-apres-sleeve.php\">pregnancy after a sleeve<\/a>.<\/li>\n<li><strong>Menopause<\/strong>, with changes in body composition and sleep.<\/li>\n<li><strong>Injury or illness<\/strong> that stops you exercising.<\/li>\n<li><strong>Bereavement, separation or stress<\/strong>, which can trigger emotional eating.<\/li>\n<li><strong>Stopping smoking<\/strong>, which is very beneficial but can increase appetite.<\/li>\n<\/ul>\n<h3>How do you protect your result during these periods?<\/h3>\n<p>Keep the minimum routine: planned meals, protein, supplements, some movement every day and your annual check-up. Tell your team about the change and ask for an extra appointment. If you are moving, take your records with you and find a new doctor before you leave, as described below.<\/p>\n<h2 id=\"expat\">Long-term follow-up when you live in Switzerland<\/h2>\n<p>Many expats move during the ten years after their operation. Others had surgery in one country and live in another. Continuity of follow-up is then the main challenge.<\/p>\n<h3>Which documents should you keep for life?<\/h3>\n<ul>\n<li>The operative report, stating exactly which operation was performed.<\/li>\n<li>Discharge letters and any later endoscopy or imaging reports.<\/li>\n<li>Your weight history, including your weight before surgery and your lowest weight.<\/li>\n<li>Your supplementation plan and recent blood test results.<\/li>\n<li>A list of your medicines and any changes made after surgery.<\/li>\n<\/ul>\n<p>Medespoir&rsquo;s guide advises giving your doctor the operative report and the supplementation schedule when you return. Keep digital copies, translated if necessary, so that any new doctor can continue your care.<\/p>\n<h3>Who pays for follow-up in Switzerland?<\/h3>\n<p>Medically necessary consultations and laboratory tests prescribed by a doctor are generally covered by basic health insurance, after your deductible and co-payment, but supplements are not always reimbursed and coverage depends on the situation. If your operation was done abroad, ask your insurer in advance how follow-up will be handled. Care received in Switzerland after an operation organised by Medespoir is at your own expense or that of your insurer; it is not part of the package.<\/p>\n<h3>What if you move away from Switzerland?<\/h3>\n<p>Before you leave, ask your doctor for a summary letter and your latest blood results, and identify a bariatric team or doctor in your new country. Plan to continue your supplements without interruption, as pharmacies abroad may stock different products.<\/p>\n<h2 id=\"tunisia\">Surgery in Tunisia and follow-up from Switzerland<\/h2>\n<p>Medespoir organises bariatric surgery in Tunisia for people living in Switzerland, as described in its <a href=\"https:\/\/www.medespoir.ch\/guide-chirurgie-obesite.php\">obesity surgery guide<\/a> and its <a href=\"https:\/\/www.medespoir.ch\/sleeve.php\">sleeve<\/a> and <a href=\"https:\/\/www.medespoir.ch\/bypass.php\">bypass<\/a> pages. Long-term success then depends on combining the team abroad with a doctor in Switzerland.<\/p>\n<h3>How is follow-up organised after the return?<\/h3>\n<p>Remote follow-up after the return to Switzerland is part of the Tunisian package. According to Medespoir&rsquo;s guide, support after the return is organised through regular exchanges with your advisor and blood tests at the planned dates; you are encouraged to send your results for a second opinion, and the nutritional handover is organised before you leave. The supplementation itself, the blood tests on schedule, the dietary rules and physical activity remain your responsibility, as the guide makes clear.<\/p>\n<h3>What does this mean for the long term?<\/h3>\n<p>That you should have a doctor in Switzerland from the start: a general practitioner who receives the operative report, prescribes the annual blood tests and refers you to a dietitian, psychologist or bariatric centre if needed. Consultation and medical documents in Tunisia are in French, so you may want translations for an English-speaking doctor.<\/p>\n<h3>What about cost?<\/h3>\n<p>Bariatric surgery in Tunisia is significantly cheaper than in Switzerland; the exact price is given in a free, personalised quote within 48 hours. The package covers the operation, the hospital stay, the hotel with full board for you and one companion, transfers and remote follow-up after your return. Flights, travel insurance (recommended) and care received in Switzerland after your return are at your expense. For Turkey, where Medespoir has clinics in Istanbul, the quote specifies whether bariatric surgery is possible and where.<\/p>\n<h2 id=\"checklist\">Your checklist<\/h2>\n<ul>\n<li>Know your operation, your starting weight and your lowest weight.<\/li>\n<li>Take your supplements every day, without breaks.<\/li>\n<li>Have blood tests at least once a year, as set out in the SMOB guidelines.<\/li>\n<li>See a dietitian regularly in the first five years, and whenever your weight rises.<\/li>\n<li>Eat three planned meals, protein first; avoid grazing and liquid calories.<\/li>\n<li>Aim for 150 to 300 minutes of activity a week, plus strength training twice a week.<\/li>\n<li>Weigh yourself regularly and agree on a threshold for contacting your team.<\/li>\n<li>Watch your alcohol intake, especially after a bypass.<\/li>\n<li>Seek help early for low mood, loss of control over eating or emotional eating.<\/li>\n<li>Keep your records with you when you change doctor, canton or country.<\/li>\n<\/ul>\n<h2 id=\"faq\">Frequently asked questions<\/h2>\n<h3>Is it normal to regain some weight after bariatric surgery?<\/h3>\n<p>Yes. A modest rebound after the lowest weight, usually reached one to two years after surgery, is common and considered physiological. Significant regain is a reason to contact your team.<\/p>\n<h3>How much weight do people keep off after ten years?<\/h3>\n<p>In the Swiss SM-BOSS trial, patients had lost about a quarter of their initial weight after ten years, with similar results after sleeve and bypass. Individual results vary widely.<\/p>\n<h3>Is a sleeve less durable than a bypass?<\/h3>\n<p>Total weight loss at ten years was similar in SM-BOSS, but sleeve patients needed a second operation much more often, mainly because of reflux or insufficient weight loss.<\/p>\n<h3>How often should I have blood tests years after surgery?<\/h3>\n<p>At least once a year, according to the Swiss SMOB guidelines, with tests for blood count, iron, vitamins, minerals, liver and kidney function and other markers.<\/p>\n<h3>Do support groups really help?<\/h3>\n<p>Studies consistently find that people who attend support groups tend to lose more weight and keep it off better, although this may partly reflect motivation. They also help with the emotional side of life after surgery.<\/p>\n<h3>Can I take Wegovy or Mounjaro if I regain weight after surgery?<\/h3>\n<p>These medicines can help after surgery, according to recent studies. Whether they are suitable and reimbursed in your case depends on your situation and the official conditions; discuss it with your doctor.<\/p>\n<h3>How much exercise do I need to maintain my weight?<\/h3>\n<p>The WHO recommends at least 150 to 300 minutes of moderate activity a week plus strength training on two days. Many people maintaining weight loss need the upper end of this range.<\/p>\n<h3>Can I stop my vitamins once my weight is stable?<\/h3>\n<p>No. The SMOB guidelines call for long-term multivitamins after a sleeve or bypass and lifelong supplementation after malabsorptive procedures. Deficiencies can develop silently.<\/p>\n<h3>Is alcohol dangerous after bariatric surgery?<\/h3>\n<p>It has a stronger effect, especially after a bypass, and long-term studies show a higher risk of alcohol use disorder. Drink less, never on an empty stomach, and seek help early if drinking increases.<\/p>\n<p><strong>Your next step:<\/strong> request a <a href=\"https:\/\/www.medespoir.ch\/devis.php\">free, personalised quote<\/a> for bariatric surgery. Treatment in Tunisia is significantly cheaper than in Switzerland, with remote follow-up after your return included; the exact price is given in the quote, sent within 48 hours.<\/p>\n<p><strong>Main sources:<\/strong> <a href=\"https:\/\/doi.org\/10.1001\/jamasurg.2024.7052\" target=\"_blank\" rel=\"noopener\">Kraljevic et al., Long-term outcomes of gastric bypass vs sleeve gastrectomy: the SM-BOSS randomized clinical trial, JAMA Surgery (2025)<\/a>; <a href=\"https:\/\/doi.org\/10.1159\/000549498\" target=\"_blank\" rel=\"noopener\">Ribeiro et al., Ten-year weight regain after bariatric surgery, Obesity Facts (2026)<\/a>; <a href=\"https:\/\/doi.org\/10.1016\/j.soard.2026.03.006\" target=\"_blank\" rel=\"noopener\">Wills et al., International expert consensus on weight recurrence and suboptimal response after metabolic and bariatric surgery, SOARD (2026)<\/a>; <a href=\"https:\/\/doi.org\/10.1007\/s11695-025-08359-6\" target=\"_blank\" rel=\"noopener\">Majid et al., Definitions and recommendations for weight recurrence, Obesity Surgery (2025)<\/a>; <a href=\"https:\/\/doi.org\/10.1007\/s11695-025-08414-2\" target=\"_blank\" rel=\"noopener\">Osorio Manyari et al., Semaglutide and tirzepatide for recurrent weight gain after bariatric surgery, Obesity Surgery (2025)<\/a>; <a href=\"https:\/\/doi.org\/10.1093\/bjs\/znaf132\" target=\"_blank\" rel=\"noopener\">Saarinen et al., Nutritional deficiencies at 10 years in SLEEVEPASS, British Journal of Surgery (2025)<\/a>; <a href=\"https:\/\/doi.org\/10.1111\/joim.12012\" target=\"_blank\" rel=\"noopener\">Sj\u00f6str\u00f6m, Key results from the Swedish Obese Subjects study, Journal of Internal Medicine (2013)<\/a>; <a href=\"https:\/\/doi.org\/10.1093\/bjs\/znaf211\" target=\"_blank\" rel=\"noopener\">Sj\u00f6holm et al., Alcohol use disorder after metabolic bariatric surgery, British Journal of Surgery (2025)<\/a>; <a href=\"https:\/\/doi.org\/10.1111\/obr.13296\" target=\"_blank\" rel=\"noopener\">Bellicha et al., Exercise training before and after bariatric surgery, Obesity Reviews (2021)<\/a>; <a href=\"https:\/\/doi.org\/10.1007\/s11695-020-04434-2\" target=\"_blank\" rel=\"noopener\">Andreu et al., Bariatric support groups predict long-term weight loss, Obesity Surgery (2020)<\/a>; <a href=\"https:\/\/doi.org\/10.1111\/j.1467-789X.2010.00720.x\" target=\"_blank\" rel=\"noopener\">Livhits et al., Social support and weight loss after bariatric surgery, Obesity Reviews (2011)<\/a>; <a href=\"https:\/\/doi.org\/10.1007\/s11695-021-05857-1\" target=\"_blank\" rel=\"noopener\">Reiber et al., Adherence to follow-up after bariatric surgery, Obesity Surgery (2022)<\/a>; <a href=\"https:\/\/doi.org\/10.1001\/jamanetworkopen.2023.27099\" target=\"_blank\" rel=\"noopener\">Sockalingam et al., Telephone-based CBT after bariatric surgery, JAMA Network Open (2023)<\/a>; <a href=\"https:\/\/doi.org\/10.1038\/oby.2007.101\" target=\"_blank\" rel=\"noopener\">Colles et al., Grazing and loss of control after bariatric surgery, Obesity (2008)<\/a>; <a href=\"https:\/\/doi.org\/10.1001\/jamasurg.2023.2930\" target=\"_blank\" rel=\"noopener\">Mok et al., BARI-OPTIMISE trial, JAMA Surgery (2023)<\/a>; <a href=\"https:\/\/www.smob.ch\/\" target=\"_blank\" rel=\"noopener\">SMOB, guidelines for the surgical treatment of obesity (in force since 1 July 2023)<\/a>; <a href=\"https:\/\/svde-asdd.ch\/wp-content\/uploads\/2026\/02\/2026_01_28_Positionspapier-Wegovy-Mounjaro.pdf\" target=\"_blank\" rel=\"noopener\">SVDE and ALLOB, position paper on Wegovy and Mounjaro (31 January 2026, in German)<\/a>; <a href=\"https:\/\/www.who.int\/publications\/i\/item\/9789240015128\" target=\"_blank\" rel=\"noopener\">WHO, guidelines on physical activity and sedentary behaviour (2020)<\/a>; <a href=\"https:\/\/www.saps.ch\/\" target=\"_blank\" rel=\"noopener\">Swiss Obesity Foundation (SAPS)<\/a>; Medespoir, <a href=\"https:\/\/www.medespoir.ch\/guide-chirurgie-obesite.php\">obesity surgery guide<\/a>.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Ten-year results of the Swiss SM-BOSS trial, lifelong follow-up under the SMOB guidelines, exercise, alcohol, support groups and what to do when the weight starts to return.<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[285],"tags":[],"class_list":["post-12786","post","type-post","status-publish","format-standard","hentry","category-switzerland"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.8 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Maintaining Weight Loss After Bariatric Surgery<\/title>\n<meta name=\"description\" content=\"Maintaining weight loss after bariatric surgery: follow-up at 5 and 10 years, exercise, support groups, alcohol and how to act early on regain.\" \/>\n<meta name=\"robots\" content=\"index, follow, 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