Hormonal
Modern incretin-based and multi-agonist peptide therapies (GLP-1, GIP/GLP-1, and triple agonists) induce double-digit percentage weight loss (15-25%) that approaches or exceeds outcomes historically associated with bariatric surgery.
If you have obesity, modern peptide therapies like tirzepatide or semaglutide can help you lose 15-25% of your body weight, which is significantly more than older drugs and approaches the results of surgery. These treatments work by targeting the hormones that control your hunger and metabolism. While they are injectable and can be expensive, they are increasingly considered first-line treatments, especially if you have other health risks like heart disease or diabetes. You should discuss these options with your doctor to see if they are appropriate for you.
Agents such as tirzepatide and Retatrutide have exceeded previous pharmacological efficacy thresholds, achieving mean weight reductions of 20–25% in clinical trials. These outcomes approach those traditionally associated with bariatric surgery and raise important questions regarding the future positioning of pharmacological versus surgical interventions in obesity management.
Why this rating
Based on large phase-3 clinical trials (STEP, SURMOUNT) and narrative synthesis of high-quality evidence.
Source
Modern pharmacotherapy of obesity: molecular mechanisms, clinical efficacy and future therapeutic directions
Navneeth Selvan · International Journal of Basic & Clinical Pharmacology · 2026
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