Adult Pilot Study for Reference Ranges and Optimal Cut-offs for the Sucrose Challenge Test and Sucrose Breath Test

Exclusion Criteria

• •Females who are lactating or pregnant.
• •Subjects with allergy to sucrose.
• •Subjects with causes of abdominal pain or altered bowel habits other than symptoms -related to CSID (in CSID group) such as SIBO, IBD, celiac disease, pancreatitis, or -gastrointestinal bleeding.
• •Diabetes mellitus.
• •Use of systemic antibiotics, had a barium study, colonoscopy, unexplained runny diarrhea, or similar within 14 days prior to informed consent. Potential subjects can be re-screened once they meet this criterion.
• •Recent febrile illness.
• •Subject has major physical or psychiatric illness within the last 6 months that in the opinion of the investigator would affect the subject's ability to complete the trial.