RecruitingDrug trialDevelopment of a Noninvasive Metric to Measure Small Bowel Sensation - The Small Intestine Stress TestThe purpose of this research is to identify the concentration of mannitol solution (a type of sugar alcohol) that will generate a range of symptoms in individuals without Disorders of Gut Brain Interaction (DGBI) to establish the normative range of responses to small bowel (SB) distension.