Bariatric surgery explained in 5 clicks
A surgeon describes what to expect from this popular weight loss surgery.
Jan, 2026
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Is weight loss surgery in the back of your mind as you try to get your weight and overall health under control? If you have a body mass index (BMI) over 40 or a BMI of 35 with at least two obesity-related medical conditions, you may be a candidate. And while there are a variety of weight loss surgeries to choose from, one of the most popular in the US is the Roux-en-Y gastric bypass. The procedure makes the stomach smaller, allowing a patient to feel full with less food.
Click through to get the facts about gastric bypass—considered the gold standard in weight loss surgery—from bariatric surgeon Aliu Sanni, MD of Eastside Medical Center in Snellville, Georgia.
Written byMichael Gollust.
Medically reviewed byAnn Wendling, MD, MPH.