Treatments and supplements · Bariatric surgery (gastric bypass, sleeve)

Does weight loss surgery keep the weight off better than medication?

What we can tell you today: how thoroughly this has been studied.

Thoroughly studied

5 studies, of which 3 bring together the results of several trials in people. This is as strong as evidence gets.

5 Repeated evidence 3 studies

4 Large controlled trial 2 studies

This says how thoroughly something has been studied — not whether it works for you. What each study actually found is in the study itself, and in the plain-language write-ups we are adding.

Appears under: Weight loss and GLP-1 · Hair and nails

The studies

5 Repeated evidence Effect of Glucagon-like Peptide-1 Receptor Agonists (GLP-1RA) on Weight Loss Following Bariatric Treatment.
2024 · The Journal of clinical endocrinology and metabolism · 1,164 participants
5 Repeated evidence Efficacy and Safety of GLP- 1 Receptor Agonists in the Management of Weight Recurrence or Suboptimal Clinical Response after Undergoing Metabolic Bariatric Surgeries: A Meta-Analysis.
2025 · Obesity surgery
4 Large controlled trial A randomized, double-blind, placebo-controlled trial of weight loss using liraglutide 3.0 mg for weight recurrence after Roux-en-Y gastric bypass.
2025 · Surgery for obesity and related diseases : official jou · 132 participants
5 Repeated evidence Hair Loss After Metabolic and Bariatric Surgery: a Systematic Review and Meta-analysis.
2021 · Obesity surgery · 2,538 participants
4 Large controlled trial Does Lifestyle Intervention After Gastric Bypass Surgery Prevent Weight Regain? A Randomized Clinical Trial.
2020 · Obesity surgery · 165 participants