Guideline Recommendations for the Initial Evaluation of Chronic Food‑Triggered Diarrhea

1. First‑Line Blood Testing (British Society of Gastroenterology)

2. First‑Line Stool Testing (British Society of Gastroenterology)

3. Endoscopic Evaluation (Age‑Stratified Approach)

Alarm Features Requiring Urgent Endoscopy (British Society of Gastroenterology)

Strong recommendation to expedite endoscopic assessment when any of these are present. [4][7]

Biopsy Protocol

4. Advanced (Third‑Line) Testing – Reserved for Persistent or Unexplained Cases

5. Special Population Considerations