Bariatric Surgery
Published
August 8, 2026
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One Anastomosis Gastric Bypass (OAGB) Explained: A Complete Patient Guide
OAGB (also called MGB) is a simplified gastric bypass with one anastomosis. It increases GLP‑1, improves insulin sensitivity, produces strong weight loss, and is an alternative to RYGB for selected patients.

Quick Answer
OAGB creates a long gastric pouch and connects it to the small intestine with one anastomosis. It increases GLP‑1, improves insulin resistance, and produces 30–40% total body weight loss with fewer technical steps than RYGB.
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Published Date:
2026-09-12 21:33
Word Count:
3400
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14
Obesity By The Numbers
Key statistics that highlight the growing impact of obesity.
OAGB increases GLP‑1, reduces ghrelin, improves insulin sensitivity, accelerates nutrient delivery to the intestine, and enhances satiety signaling.
Medical Topics Covered
This article covers the following medical topics and related areas.


Nestor de la Cruz-Muñoz, MD, FACS, DABOM
About the Author
Nestor de la Cruz‑Muñoz, MD, FACS, DABOM
Dr. Nestor de la Cruz‑Muñoz is a nationally recognized bariatric, metabolic, and foregut surgeon with more than 20 years of experience treating complex obesity‑related and gastrointestinal conditions. He serves as the Medical Director of Bariatric and Metabolic Surgery at HCA Florida Mercy Hospital and has held academic appointments as a Professor of Surgery at a major university‑based medical center.
Dr. de la Cruz‑Muñoz specializes in advanced minimally invasive and robotic surgery, metabolic disease management, and comprehensive long‑term patient care. His work integrates clinical expertise, academic leadership, and a commitment to evidence‑based medicine. He has trained surgeons across the country, contributed to national guidelines, and is widely regarded for his outcomes, innovation, and patient‑centered approach.
Patients choose Dr. de la Cruz‑Muñoz for his combination of surgical excellence, metabolic expertise, and lifelong dedication to improving patient health through compassionate, high‑quality care.
Dr. de la Cruz‑Muñoz specializes in advanced minimally invasive and robotic surgery, metabolic disease management, and comprehensive long‑term patient care. His work integrates clinical expertise, academic leadership, and a commitment to evidence‑based medicine. He has trained surgeons across the country, contributed to national guidelines, and is widely regarded for his outcomes, innovation, and patient‑centered approach.
Patients choose Dr. de la Cruz‑Muñoz for his combination of surgical excellence, metabolic expertise, and lifelong dedication to improving patient health through compassionate, high‑quality care.












