A systematic review of 29 RCTs finds lifestyle interventions rank highest for preventing weight regain, while semaglutide supports sustained loss during use but weight returns after stopping.
29 RCTs comparedNetwork meta-analysis ranking lifestyle, semaglutide, and surgery for weight maintenance
What the researchers found
Lifestyle interventions ranked highest for preventing recurrent weight gain; semaglutide supports sustained loss during treatment but weight regain occurs after discontinuation; bariatric surgery provides the largest initial loss.
Why it matters
The biggest challenge in obesity treatment isn't losing weight — it's keeping it off. This analysis directly compares the long-term weight maintenance of the three major treatment approaches.
How the study worked
Systematic review and network meta-analysis of 29 RCTs with literature search through March 2025.
What this study cannot tell us
Heterogeneous trial designs and follow-up durations; lifestyle intervention intensity varies widely; semaglutide discontinuation data limited; surgical techniques differ across studies.
How to read the evidence
Systematic review and network meta-analysis of RCTs — highest level of evidence synthesis for comparative effectiveness.
When this study was published
Published in 2026 with evidence through March 2025, providing the most current comparative weight maintenance data.
The bigger picture
This challenges the narrative that semaglutide is a permanent solution for obesity — without ongoing use, weight returns. The finding that lifestyle changes best prevent regain underscores the importance of behavioral foundations.
Questions still open
- Is lifelong semaglutide use the only way to maintain its weight loss benefits?
- Could combining semaglutide with intensive lifestyle intervention optimize long-term weight maintenance?
Common questions
Do you gain weight back after stopping semaglutide?
Which weight loss method is best long-term?
Read the original research
Recurrent Weight Gain after Weight Loss Induced by Lifestyle Intervention, Metabolic and Bariatric Surgery, or Semaglutide in Adults with Obesity: A Systematic Review of Randomized Controlled Trials.
Obesity surgery, 36(2), 792-803
Citation
Chen, Huixian; Guo, Xiaojing; Long, Tianxue; Li, Mingzi. (2026). Recurrent Weight Gain after Weight Loss Induced by Lifestyle Intervention, Metabolic and Bariatric Surgery, or Semaglutide in Adults with Obesity: A Systematic Review of Randomized Controlled Trials.. Obesity surgery, 36(2), 792-803. https://doi.org/10.1007/s11695-025-08415-1