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Doctor insights on: Why Have I Not Lost Weight After Gastric Bypass

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Dr. Gregg Nishi
473 doctors shared insights

Gastric Bypass Surgery (Definition)

Gastric bypass surgery is a restrictive and malabsorptive procedure to help lose weight. Restrictive is in the fact that the stomach is down sized to a 2 oz pouch and malabsorptive is in bypassing part of the stomach and 100 to 150 cm of the small ...Read more


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I have stomach ulcers after gastric bypass and I have no desire to eat is that normal?

I have stomach ulcers after gastric bypass and I have no desire to eat is that normal?

No, but not uncommon: Follow up with surgeon. Tested for h .Pylori? Can cause ulcers. Marginal ulcers usually on the intestinal side of the anastomosis (seam) not rare. Needs follow up, especially if interfering with oral intake, or if vomiting ( a big deal). See your doc. ...Read more

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What do you recommend if I had gastric bypass. have gained some weight back. can I get my stomach stapled again?

What do you recommend if I had gastric bypass. have gained some weight back. can I get my stomach stapled again?

Go back to your: bariatric surgeon. Yes may need revision ( surgery ) after evaluation . Success after revision is very good , but you have to modify your style , by exercise and limiting your intake and be active ...Read more

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I had gastric bypass 4 years ago but I still have some 10 extra kilos to lose. Can I take fat burner?

Excercise: Fat burners don't work. It is better to lose weight slowly. Persist with exercise and put more muscle. The muscles are your engines for metabolism. ...Read more

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I had gastric bypass surgery 3yrs ago lost 120 lbs doin great but nolonger have ins. So how can I lose belly fat without surgery?

I had gastric bypass surgery 3yrs ago lost 120 lbs doin great but nolonger have ins. So how can I lose belly fat without surgery?

Go to gym: Regularly do exercises , eat healthy balanced food you will loose the belly fat but the loose skin will not go away , even if you ware elastic bandages , skin once stretched will not contract ( but will to certain extent in young ) you will need some type of corrective surgery if it bothers you. ...Read more

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Are hernias & weight loss related? My boss had one after gastric bypass. I am doing ww to lose weight. I have a hiatal hernia too. Had lost a lot b4.

Anatomy: I do not get the question and am trying to understand it from your point of view. Being obese or significantly over weight increases the likelihood of all kinds of hernias. But, a hiatal hernia is very different than an umbilical or abdominal wall hernia. I see no connection between any kind of hernia and the ability to lose weight. ...Read more

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I had a RNY Gastric Bypass 03/01/2005 lost 215lbs, however, have gained back 75-80lbs, would like to know if OK to do a cleanse?

I had a RNY Gastric Bypass 03/01/2005 lost 215lbs, however, have gained back 75-80lbs, would like to know if OK to do a cleanse?

Why bother: I would follow the diet you MD recommended, and if you have any questions ask him/her. Cleanses are a trendy hoax and have no health benefits. ...Read more

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How can I stop losing weight after gastric bypass surgery?

How can I stop losing weight after gastric bypass surgery?

Stop weight loss: Usually, weight loss tapers off and stops around a year to a year and a half after bypass surgery. If you are under a year out from surgery, i wouldn't worry about it. If you are several years out, make sure you eat enough food everyday. Some surgeons bypass too much of your intestinal tract and that can cause excessive weight loss. That can be fixed surgically. ...Read more

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I lost weight diring pregnancy, i lost more when i gave birth almost 8kilos, after 2months i lost another 2-3kilos.Is this normal? What to do?Ihave GERD

I lost weight diring pregnancy, i lost more when i gave birth almost 8kilos, after 2months i lost another 2-3kilos.Is this normal? What to do?Ihave GERD

Impossible: There is no way to comment without much more information such as your weight, lab data, and the list goes on and on. You need to be working with your physician to figure this out! ...Read more

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I had gastric bypass but didn't follow diet and am now almost back to my before weight. Help.

I had gastric bypass but didn't  follow diet and am now almost back to my before weight.  Help.

Wt gain after bypass: You need to get re-engaged with your weight loss program where you had surgery (assuming they offer a support program). Patients who attend support groups are more successful than those who do not attend. There may also be an anatomical reason why you have gained weight like an enlarged gastric pouch, an enlarged anastomosis, or both, which can be corrected with revisional surgery. ...Read more

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Why do I burp all the time after having bariatric gastric sleeve surgery?

Why do I burp all the time after having bariatric gastric  sleeve surgery?

Swallowed air. : Most belching is due to swallowed air. People with acid reflux and heartburn swallow much more often to clear the acid in esophagus. With a sleeve, you might still have reflux. Should be on acid suppressing med (prilosec) and give it time. Usually gets better after few months. ...Read more

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I used to eat roux and had gastric bypass 8 years ago. I lost 120 lbs in a year. In the succeeding years, I have gained back 45 lbs. What should I do?

Regain weight bypass: There are many reasons why you may have regained weight. It can be your habits like eating too much, poor food choices, not enough exercise, etc., or it can be an anatomical problem with a stretched pouch, a dilated anastomosis, a gastro-gastric fistula, or some combination of all of these. You need to see a bariatric surgeon that specializes in revisions and get an UGI and egd. ...Read more

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I am 230 pounds and I am scheduled for my gastric sleeve surgery how much weight did you lose?

I am 230 pounds and I am scheduled for my gastric sleeve surgery how much weight did you lose?

2 points: Check with: Your surgeon about how much you will likely lose. 2ndly you meant how much would you lose (not how much did i lose) ? ...Read more

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I had gastric sleeve in 2010 and am starting to gain weight after losing 90 pounds. Will my stomach shrink back if i eat less?

I had gastric sleeve in 2010 and am starting to gain weight after losing 90 pounds. Will my stomach shrink back if i eat less?

Prob not: Stomach is a dynamic organ and expands as we eat and than empties slowly over time. Surgery on stomach to restrict capacity works well for most people but stomach capacity can get bigger over time. So now you have to rely on ur habits and visual cues and food diary to figure out how many calories ur are taking in. Also need to work on burning more calories than u take in. ...Read more

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Can a gastricbypass reu n y of ten years reverse itself or stop working? 10 years ago i had gastric by pass surgery, i lost weight, however recently I have been following same routine and I have been gaining weight like crazy. I am on an antidepressant,

Can a gastricbypass reu n y of ten years reverse itself or stop working? 10 years ago i had gastric by pass surgery, i lost weight, however recently I have been following same routine and I have been gaining weight like crazy.  I am on an antidepressant,

The : The roux-en-y gastric bypass is the most common and successful type of gastric bypass procedure. The surgeon begins by creating a small pouch by dividing the upper end of the stomach. This restricts the intake of food. Next, a y-shaped section of the small intestine is attached to the pouch to allow food to bypass the lower stomach, the duodenum (the first segment of the small intestine), as well as the first portion of the jejunum (the second segment of the small intestine). The procedure creates a direct connection from the stomach to the lower segment of the small intestine, literally bypassing portions of the digestive tract that absorb calories and nutrients. The success of this procedure to achieve significant long term weight loss is shown by an average 70% excess weigh loss within the firs two years after surgery. It is also been shown to be effective in stabilizing or reversing the complications of obesity, including: type 2 diabetes, heart disease, sleep apnea, gastroesophageal reflux, high blood pressure and elevated cholesterol levels. The surgery should be only part of a comprehensive approach to weight control. Careful monitoring pre- and post-operatively should be done in order to prevent nutritional complications after surgery and maintain weight loss. However in about 20% of patients, weight gain after initial weight loss can occur. This may be due to psychological reasons, such as non-adherence to diets, but also from anatomic reasons, such as the gastric pouch enlarging, or the connection between the stomach and the bypass opening enlarging. On rare occasions, a false connection between the two ends of the stomach, called a gastro-gastric fistula, will allow food to bypass the bypassed intestine. If you are gaining weight, you should see a gastroenterologist that follows such patients, or a bariatric surgeon, to assess why this may be occuring. A consult with a nutritionist may also uncover whether inappropriate diet may be contributing. In some cases, revision of the previous surgery may allow for weight loss. ...Read more

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I'm 29 years old and i haven't been having an appetite . I have been loosing weight due to not eating but i don't want to loose weight in my chest !?

I'm 29 years old and i haven't been having an appetite .  I have been loosing weight  due to not eating but i don't want to loose weight in my chest !?

Weight loss: Can't be that selective. Need to exercise to counter the weight loss: do bench press, incline, decline, lat pull down, fly exercises all with progressive weights. Consider good quality protein with lots of water. ...Read more

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How do I calculate percentage of excess body weight I have lost after gastric sleeve?

How do I calculate percentage of excess body weight I have lost after gastric sleeve?

Calculate: Look up what your ideal body weight is. Subtract your ideal body weight from your original weight. That number is the denominator representing your total excess weight. The numerator is the amount of weight you have actually lost. So if your excess weight was 50 lbs and you have lost 20 lbs, you have lost 20/50=40% of excess body weight. ...Read more

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Can I do the duodenal switch with a BMI of 27.5? Had gastric bypass 7 yrs ago. Gaining weight again. I exercise, but my stomach fits a lot of food!

Can I do the duodenal switch with a BMI of 27.5? Had gastric bypass 7 yrs ago. Gaining weight again. I exercise, but my stomach fits a lot of food!

No: Duodenal switch will not work in a patient that has undergone gastric bypass, since the food stream no longer goes by way of the duodenum. If you are gaining weight after a gastric bypass, you should see your surgeon or a specialized GI physician, who can determine the cause for weight gain. This is usually due to enlargement of the connection between the stomach pouch and the intestine. ...Read more

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I have gastric pain when I skip my meal or eat late. Now I want to lose weight, im thinking of drinking weightloss meal replacement? Is it ok?

I have gastric pain when I skip my meal or eat late. Now I want to lose weight, im thinking of drinking weightloss meal replacement? Is it ok?

Why do you have pain: First thing is to figure out why you have pain when you postpone eating? Losing weight if you have weight to lose, can be a great thing for your health, but don't ignore signs that your body is telling you if they are not going away. Ulcers are common and can be treated by seeing your doctor. Gastric pain can be related to other more serious conditions that you will want to rule out. Take care! ...Read more

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I did not lose any weight after having 1st baby. Cant breastfeed but can I pump to lose weight after 2nd?

I did not lose any weight after having 1st baby. Cant breastfeed but can I pump to lose weight after 2nd?

Pumping is healthy: I am not sure that pumping will result in weight loss for you but it will certainly be healthy for your child! the real question is why you did not lose any weight after the first. If you have a metabolic issue or Insulin resistance then pumping may not help. I suggest you see both your physician and a chinese medicine practitioner to assess what may be blocking losing weight. ...Read more

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How can I stop losing weight after gastric bypass surgery?

Stop weight loss: Usually, weight loss tapers off and stops around a year to a year and a half after bypass surgery. If you are under a year out from surgery, i wouldn't worry about it. If you are several years out, make sure you eat enough food everyday. Some surgeons bypass too much of your intestinal tract and that can cause excessive weight loss. That can be fixed surgically. ...Read more

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Patients with gastric bypass can they gain weight back?

Patients with gastric bypass can they gain weight back?

Yes: Regaining weight frequently happens. It used to be thought that it had to do with enlargement of the gastric pouch, but more recent studies suggest that it is related to a gradual widening of the gastrojejunal anastomosis (the joining between the stomach pouch and small intestine that is created). ...Read more

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Can I receive gastric bypass being almost 100 pounds over weight?

Can I receive gastric bypass being almost 100 pounds over weight?

Yes: However it is a big decision requires extensive evaluation prior to the surgery. Also it is a commitment to start changing behavior regarding healthy eating and exercise as much as you tolerate before not after the surgery. ...Read more

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Had gastric bypass 12 yrsago. Lost 130#. Gains about 95 back. Would weight watchers work for me. . Can't afford a revision.?

Had gastric bypass 12 yrsago. Lost 130#. Gains about 95  back.  Would weight watchers work for me. .  Can't afford a revision.?

Absolutely : Yes weight watchers, jenny craig or any of the other weight loss programs would work. It would certainly help if you worked closely with a nutritionist and a trainer at te gym. You proved to yourself already that when you had the right tool and you used it, you lost weight. You simply need to use a new tool to help yourself in the right direction. Good luck. ...Read more

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I had gastric bypass but didn't follow diet and am now almost back to my before weight. Help.

Wt gain after bypass: You need to get re-engaged with your weight loss program where you had surgery (assuming they offer a support program). Patients who attend support groups are more successful than those who do not attend. There may also be an anatomical reason why you have gained weight like an enlarged gastric pouch, an enlarged anastomosis, or both, which can be corrected with revisional surgery. ...Read more

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Do gastric sleeve or gastric bypass work better for losing weight?

Both similar: The sleeve and bypass work in almost all patients. Our experience is to expect about an 80% excess body weight loss with the bypass and 70% with the sleeve. So if you weigh 250 and you are supposed to weigh 150, then you have an excess weight of 100 lbs. Most patients make their decision based on side effects or risks. Both are great. ...Read more

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Can you revise a gastric bypass surgery if you gain the weight back?

Can you revise a gastric bypass surgery if you gain the weight back?

Likely: but you need expert advice on exactly what was done and what is possible in the current situation. ...Read more

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Is gastric bypass safe for an 18yr old who is more then 200lbs over-weight?

Is gastric bypass safe for an 18yr old who is more then 200lbs over-weight?

Yes: Although weight loss surgery as with any surgery has it's own risks and complications, bariatric surgery performed for this type individual by an expert in the field of bariatric surgery can result in long term health benefits. Be sure to ask about the complications that can occur, as well as the surgeons' own complication rate to make sure that you're making an informed decision. ...Read more

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How much weight do most people loose in the first months after gastric bypass surgery?

How much weight do most people loose in the first months after gastric bypass surgery?

2-4 pounds per week: Weight loss after gastric bypass surgery varies depending on your starting weight, where you carry your weight (abdomen versus lower body), how well you stick to your dietary regimen, whether you drink liquid calories (except for protein shakes!), and your other illnesses that may limit your exercise. Higher weight loss is seen in those that exercise, follow their diet, and see their surgeon! ...Read more

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I am 25 years. I weigh 224 an I am thinking about doing a gastric bypass to lose weight. Do u think that's a good choice for me?

Gastric bypass: That depends on your height. If you are 5'3" and have no medical problems, you would qualify. If you are 5'7" and have medical problems like diabetes, high blood pressure, sleep apnea, asthma, gerd, etc., you would also still qualify. It is all dependent on your body mass index (bmi). You need a bmi greater than 40 if healthy, or greater than 35 if you have medical problems. ...Read more

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How does gastric bypass surgery work in losing weight?

Makes you feel full: Since the large stomach is eliminated or reduced in size one feels full after small meals. This helps to reduce intake and weight ultimately. ...Read more

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How effective is a gastric bypass for natural weight loss?

How effective is a gastric bypass for natural weight loss?

Natural ???: You have altered your bodies physiology by surgery. What's natural about that ? You will lose weight. How much depends on the individual ...Read more

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Can you please tell me the mean weight loss 6 months after gastric bypass?

Bypass: Variable depending on each patient and how committed the patient is average weight loss is about 60-70% excesss body weight at one year. ...Read more

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I had a gastric bypass but gained back some of the weight. Will garcinia cambogia work for me?

I had a gastric bypass but gained back some of the weight. Will garcinia cambogia work for me?

Doubt it...: Garcinia cambogia is a plant often used in asian recipes. The skin of the fruit contains hydroxycitric acid which is the active ingredient that in rats inhibits a fat producing enzyme called citrate lyase that increases serotonin levels leading to significant weight loss. In human studies short-term weight loss is less impressive ; the clinical relevance is uncertain ; statistically insignificant. ...Read more

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Help please! is gastric bypass a good idea for an 18yr old who is more then 200lbs over weight?

Help please! is gastric bypass a good idea for an 18yr old who is more then 200lbs over weight?

Good question: Gastric bypass introduces a "new disorder" because the gut is rearranged from its natural condition. At 18, there is a long life to be affected. On top of that, a low calorie diet must be followed after the surgery or else the weight will be regained. It is far more preferable to be able to decrease calorie counts and increase exercise, without the surgery. But, 200 # overweight is not good. ...Read more

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Hi i've had gastric bypass surgery 3 years ago and i stopped losing weight 1 year after the surgery... I'm still not happy with my weight what to do?

Hi i've had gastric bypass surgery 3 years ago  and i stopped losing weight 1 year after the surgery... I'm still not happy with my weight what to do?

Bypass surgery: To have successful variant roc surgery one must include significant life changes to include exercise, limiting calories--especially sugars and other carbohydrates. One must have a psychic change where food plays less of an emotional role. And, you must eat slowly and may i repeat, limit your calories! ...Read more

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Had gastric bypass-gained half of weight list back, but I still can't eat normally, & I seldom get hungry. Can't eat meat or much fruit. Any thoughts?

Had gastric bypass-gained half of weight list back, but I still can't eat normally, & I seldom get hungry. Can't eat meat or much fruit. Any thoughts?

Eat solids, no sips: Weight regain after bypass is usually due to eating foods that go down comfortably. There is a tendency to fall into a pattern o slider foods (soups), sipping with food, and snacks. In essence you are defeating the surgery to lose weight, you need to eat foods that pack the pouch (bread, chicken, etc) and fill you up. Don't drink with or after meals or you will wash food down. ...Read more

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Whts the best OTC meds to get for weight lost. Im 21 yrs old n being close to pushing 300 and im considrring gastric bypass but i don't have insurance ?

No meds for weight: Please do not buy into hype or fad diets. There is no medication to help you lose weight and keep it off in any healthy way. Bariatric surgery is a valid and effective way to not only lose weight but to resolve some obesity related medical conditions such as diabetes, hypertension, arthritis. Weight loss techniques also include low calorie high protein diets with regular exercise. ...Read more

Gastric (Definition)

This refers to something that is ...Read more