- Abdominal pain
- Bloating
- Celiac disease
- Colon cancer
- Constipation
- Crohn's disease
- Diarrhea
- Elevated liver blood test
- Eosinophilic esophagitis
- Gastroesophageal reflux disease (GERD)
- Irritable bowel syndrome (IBS)
- Liver cirrhosis
- Liver failure
- Peptic ulcer disease
- Small intestinal bacterial overgrowth (SIBO)
- Swallowing difficulty
- Ulcerative colitis (UC)
- Colon cancer screening
- Colonoscopy