RecruitingSmall Intestinal Bacterial Overgrowth (SIBO) in Pancreatic Adenocarcinoma (PDAC)The purpose of this study is to prospectively analyze the prevalence of SIBO in patients with Pancreatic adenocarcinoma (PDAC) and understand its association with weight loss and pancreatic resection status. Each patient will be tested for SIBO using Lactulose Hydrogen Breath Test. 100 patients with diagnosed pancreatic adenocarcinoma and clinically diagnosed weight loss will be enrolled in this study.