obese subjects were compared to other members of the cohort, nor was it influenced by how much they drank or if they smoked. If they had had surgery at all, their likelihood of skin cancer was reduced.There are several types of gastric surgery, butthe U.S. National Institute of Diabetes and Digestive and Kidney Diseases , two of the most common in the United States—and the ones which some of this study's Swedish subjects underwent—are gastric bypass and banding.
"The bypass also changes gut hormones, gut bacteria, and other factors that may affect appetite and metabolism," according to NIDDK.