Gastroenterology
Conditions
Deep dives — Celiac Disease: Serology: tTG, DGP, EMA · HLA-DQ2 / DQ8 Genetic Testing · Endoscopy, Biopsy & Marsh Staging · Gluten-Free Diet Practical Guide · Non-Celiac Gluten Sensitivity · Refractory Celiac & EATL · Nutritional Deficiencies & Bone Health · Associated Autoimmune Conditions
Deep dives — Inflammatory Bowel Disease: Crohn's vs Ulcerative Colitis: Key Differences · Diagnostic Workup: Calprotectin, Colonoscopy, MRE · Biologics: TNF, IL-23 & Integrin Inhibitors · JAK Inhibitors & S1P Modulators · Diet: SCD & Mediterranean · Surgery: Resection, J-Pouch, Ostomy · Extraintestinal Manifestations · Fatigue, Anemia & Nutrient Deficiencies · Pregnancy & IBD
Deep dives — Irritable Bowel Syndrome: Rome IV Subtypes (IBS-C/D/M/U) · Low-FODMAP Diet · Visceral Hypersensitivity & Brain-Gut Axis · IBS & SIBO Overlap · Post-Infectious IBS · IBS Medications Guide · Gut-Directed Hypnotherapy & CBT · Peppermint, Probiotics & Herbals
Deep dives — SIBO: gas subtypes · breath testing · low-FODMAP · elemental diet · rifaximin · herbal antimicrobials · prokinetics & relapse prevention · root causes
Gastroenterology focuses on the digestive system, including the esophagus, stomach, intestines, liver, pancreas, and gallbladder.
Gut Health
Gut Health
The gut-health hub: digestion animations, the microbiome, fermented foods, fiber, digestive support and digestive conditions in one place.
Read the deep dive →Your Microbiome
The gut’s bacteria, with the research sorted by strain and by condition.
Read the deep dive →Fermented Foods
Yogurt, kefir, sauerkraut, kimchi, miso, natto and tempeh, and what the studies of each report.
Read the deep dive →Dietary Fiber
What fiber is, which foods supply it, and what the human trials found.
Read the deep dive →Digestive Support & Practices
Stomach acid, enzymes, bitters and other practices aimed at digestion, with their research.
Read the deep dive →Digestive Conditions
SIBO, IBS, reflux and other conditions, linked to their full deep-dive series.
Read the deep dive →Watch Your Gut Work
Interactive animations of digestion, from the first bite to absorption.
Read the deep dive →All Gastroenterology Articles A–Z
Every article in this specialty, listed alphabetically.
- Achalasia
- Barry Marshall & Robin Warren — H. pylori, the self-experiment, and the ulcer cure
- Acute Cholangitis
- Acute Cholecystitis
- Acute Colonic Pseudo-Obstruction (Ogilvie's Syndrome)
- Appendicitis
- Autoimmune Hepatitis
- Autoimmune Pancreatitis
- Barrett's Esophagus
- Carcinoid Tumor
- Celiac Disease
- Choledocholithiasis
- Crohn's Disease
- Cyclic Vomiting Syndrome
- Diverticulitis
- Eosinophilic Esophagitis
- Eosinophilic Gastroenteritis
- Esophageal Varices
- Fatty Liver Disease (NAFLD/MASLD)
- Functional Dyspepsia
- Gallbladder Disease
- Gallstones
- Gastritis
- Gastroesophageal Reflux Disease (GERD)
- Gastroparesis
- H. pylori (Helicobacter pylori)
- Hemorrhoids
- Hepatitis A
- Hepatitis B
- Hepatitis C
- Hiatal Hernia
- Hirschsprung Disease
- Inflammatory Bowel Disease (IBD)
- Irritable Bowel Syndrome
- Ischemic Colitis
- Lactose Intolerance
- Liver Cirrhosis
- MASLD (Metabolic Dysfunction-Associated Steatotic Liver Disease)
- Mesenteric Ischemia
- Microscopic Colitis
- Pancreatitis
- Peptic Ulcer Disease
- Primary Biliary Cholangitis
- Primary Sclerosing Cholangitis
- Short Bowel Syndrome
- Small Bowel Obstruction
- Small Intestinal Bacterial Overgrowth (SIBO)
- Superior Mesenteric Artery Syndrome
- Ulcerative Colitis
- Whipple's Disease
Featured Videos
Connections
- Gut Health — the cross-section hub: digestion animations, microbiome, fermented foods, and digestive support
- Barry Marshall — H. pylori — the ulcer bacterium, and the self-experiment that proved it
- Ivan Pavlov — the 1904 prize was for digestion, not for the bell
- Baruch Blumberg — hepatitis B, its vaccine, and liver cancer prevented
- Alter, Houghton & Rice — hepatitis C — found, then cured
- Whipple, Minot & Murphy — intrinsic factor, B12 absorption, and pernicious anaemia
- Herbs covered on this site that discuss conditions in this specialty: Bael (Aegle marmelos) · Senna · Shampoo Ginger (Zingiber zerumbet) · Wormwood · Agrimony · Chiretta (Swertia chirayita)