What are the reasons for regaining weight after bariatric surgery?


  • Drinking liquid calories (although the stomach limits the volume of food that you eat, it doesn’t prevent you from being able to drink large amounts of calories),
  • Not delaying your fluids from your solids (drinking and eating at the same time - only after surgery - appears to result in the rapid transit of the food you eat, in other words it “flushes” the food out of the stomach the same way flushing the toilet with water empties the bowl. This results in an empty stomach and a true physical hunger leading you to eat more. This is often confused with people thinking or feeling as if they have stretched their pouch),
  • Grazing/Picking and nibbling (surgery operates on the stomach, not the mind, thus the reasons that may have lead some people to overeat before surgery may remain, such as emotional eating, stress eating, using food as a coping mechanism, etc.

Some other reasons for weight regain that are less common but still possible include:

  • An enlarged gastric pouch
  • A fistula
  • Intestinal adaptation
  • New medications that may induce weight gain (i.e. anti-depressants, some forms of chemotherapy, etc)
  • A poorly controlled thyroid (synthroid doses need to be adjusted after rapid weight loss).

For further nutrition advice or to read our blog, visit our website and like our Facebook page for up-to-the-minute information:

Bariatric Surgery Nutrition

Bariatric Surgery Nutrition



Thank you for the informative article!

I'd say that 90+ percent of success after bariatric surgery is psychological. In other words, the head of an individual who has undergone weight loss surgery must be in the right place to succeed.

Getting bariatric surgery with the hope that all of one's weight problems will be magically solved is unrealistic. People who have this surgery must do the real work to succeed. For some, this entails addressing psychological aspects of why they overeat (e.g., boredom, food addiction, stress, emotional eating).

Many weight loss surgery clients who don't adopt new coping mechanisms regain weight because they utilize food for purposes other than intended. Food is intended to fuel our bodies, nothing more.

Edited by Introversion

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On 7/11/2017 at 9:26 PM, Bariatric Surgery Nutrition said:
  • Drinking liquid calories (although the stomach limits the volume of food that you eat, it doesn’t prevent you from being able to drink large amounts of calories),
  • Not delaying your fluids from your solids (drinking and eating at the same time - only after surgery - appears to result in the rapid transit of the food you eat, in other words it “flushes” the food out of the stomach the same way flushing the toilet with Water empties the bowl. This results in an empty stomach and a true physical hunger leading you to eat more. This is often confused with people thinking or feeling as if they have stretched their pouch),
  • Grazing/Picking and nibbling (surgery operates on the stomach, not the mind, thus the reasons that may have lead some people to overeat before surgery may remain, such as emotional eating, stress eating, using food as a coping mechanism, etc.

Some other reasons for weight regain that are less common but still possible include:

  • An enlarged gastric pouch
  • A fistula
  • Intestinal adaptation
  • New medications that may induce weight gain (i.e. anti-depressants, some forms of chemotherapy, etc)
  • A poorly controlled thyroid (synthroid doses need to be adjusted after rapid weight loss).

For further nutrition advice or to read our blog, visit our website and like our Facebook page for up-to-the-minute information:

Bariatric Surgery Nutrition

Bariatric Surgery Nutrition

Nothing about personal responsibility or not resolving mental issues with food?

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