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Surgery is a valuable weight loss option for people with obesity, says Dr. Howard Simon, the chief of bariatric surgery at Upstate University Hospital. He describes obesity as a complicated disease for which a gastric bypass or gastric sleeve operation may offer treatment.

Such surgeries are usually done in a minimally invasive way, and are part of a comprehensive approach to weight loss that involves counselors, nutritionists and others to help the patient achieve and maintain a healthy weight and lifestyle.