Portion-dependent
Low FODMAP only up to the serving size listed — larger servings stack.
Safe serving
75 g, about half a small one
FODMAP group responsible
- Mannitol — Polyols. Cauliflower, mushrooms, celery, sweet potato.
Why
A textbook example of portion deciding everything: low FODMAP at 75 g and high at 150 g, on mannitol. Most restaurant and home servings are well past the line, which is why sweet potato has a reputation for causing symptoms in people who believe it is a safe food.
What to use instead
Ordinary potato
No ceiling, and roasts identically.
This entry is compiled from published Monash-aligned guidance rather than our own laboratory testing, and thresholds are revised as new data arrives. For the elimination phase the Monash app is the authority. See the full food list for how the categories fit together, orcheck another food.
Low-FODMAP Elimination Phase Starter Kit
A 14-page PDF: the full safe-foods list, a two-week meal plan, a printable symptom tracker and a shopping checklist you can take to the store.