Some weight regain after sleeve gastrectomy is common over long-term follow-up. The magnitude varies widely between patients and across studies.
Common contributors
- Anatomic changes including sleeve dilation.
- Hormonal and metabolic adaptation.
- Behavioral drift (grazing, calorie-dense liquids, irregular meals).
- Decreases in physical activity.
- Other medical changes (medications, comorbidities).
How to think about evaluation
Evaluation aims to clarify which of these factors are meaningful, not to assign blame. A structured workup informs whether behavioral and medical support, endoscopic revision, or surgical revision may be appropriate to discuss.
What this is not
Weight regain is not evidence that the original surgery 'failed.' It is a common long-term pattern that has multiple effective evaluation and management options today.