Colonoscopy Prep: Why You Must Avoid Raw Fish & Sushi 5 Days Prior
Raw fish (sushi, sashimi, ceviche, poke) can harbor Anisakis larvae and other parasites. During colonoscopy, these may:
- Mimic mucosal lesions or polyps.
- Cause allergic reactions if embedded.
- Obscure visualization if numerous.
Guidelines (ASGE, ACG) recommend 5-day avoidance of all raw/undercooked seafood. Cooked fish is permitted. Also stop iron supplements, fiber supplements, and high-residue foods per your specific prep protocol (PEG, NaP, SUTAB, etc.).
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