Observational StudyAssessment and Validation of Electronic Gas and Bloating Diary

Inclusion/Exclusion for gas and bloating subjects:

Inclusion:

1. Anyone 18 to 80 years of age, inclusive with gas-related symptoms (GRS) such as gas and bloating, plus any of the following: distension, diarrhea, and/ or abdominal discomfort.
2. Normal upper endoscopy, normal colonoscopy (<5 years) if patient is > 50 years of age, normal computerized abdominal tomography scan, or a normal right upper quadrant scan

Exclusion:

1. Women of childbearing age will be asked if they are pregnant, and a negative response will be sufficient. No pregnancy test will be performed.
2. History of previous GI surgeries (except for cholecystectomy, hysterectomy, and appendectomy)
3. Significant co-morbid medical conditions, including stroke, COPD( Chronic Obstructive Pulmonary Disease) and cancers (except for non-melanotic skin cancer)
4. Recent hospitalization within 30 days of enrollment in this study
5. Recent History (within 4 weeks) of antibiotic use
6. Recent History (within one week) of a colonoscopy or barium study

Inclusion/Exclusion for healthy subjects:

Inclusion:

1. Anyone 18 to 80 years of age, inclusive with no medical problems and a negative bowel disease screening questionnaire.