Assessing the changes in the brain-gut axis after weight loss surgery and their relationship with weight loss and changes in eating behaviors.~Obese women undergoing weight loss surgery will be recruited to participate in the study. These subjects will undergo a screening visit and 4 study visits. The study visits will occur before, and at 1-, 6- and 12 months after the weight loss surgery. Each study visit will include evaluation of brain function (fMRI), anthropometrics, blood samples (gut hormones, cytokines, metabolomics ) and stool samples (16S RNA and Metabolomics) and eating behaviors questionnaires (YFAS, TFEQ, food cravings/preferences scales, 3-day food food intake records)~Primary outcomes: weight loss after surgery and changes in eating behaviors scales (YFAS, TFEQ) , metabolomics, appetite related hormones and gut microbiome (16S RNA) Secondary outcomes: changes in brain function (fMRI/MRS), diet (3-day food intake records) and inflammatory markers.
Assessing the changes in the brain-gut axis after weight loss surgery and their relationship with weight loss and changes in eating behaviors.~Obese women undergoing weight loss surgery will be recruited to participate in the study. These individuals will undergo a screening visit and 4 study visits. The study visits will occur before, and at 1-, 6- and 12 months after the weight loss surgery. Each study visit will include evaluation of brain function (fMRI), anthropometrics, blood and stool samples and eating behaviors questionnaires.