Is Oyster sauce Low FODMAP?
Oyster sauce is high FODMAP. It's best avoided during the elimination phase.
Serving thresholds
| Serving | FODMAP level | Data quality |
|---|---|---|
| 1 tbsp (18 g) | High | Class rule |
Thresholds are per sitting. FODMAP load stacks across a meal — two “low” servings of different foods can still add up.
Which FODMAPs are in oyster sauce?
During reintroduction, test the group above one at a time — tolerating oyster sauce depends on your personal threshold for Fructans, not on the food itself.
Good to know
Most commercial oyster sauce includes garlic and onion alongside oyster extract — fructans above cutoff at stir-fry serves.
Where these numbers come from
- Derivation note: Oyster extract + soy + sugar + garlic and/or onion; standard recipes push fructans above cutoff at stir-fry serves.
- Peer-reviewed paper: Varney J et al. (2017) FODMAPs: food composition, defining cutoff values and international application. J Gastroenterol Hepatol 32(S1):53–61.
Phase derives serving thresholds from published research and food-composition data so every number is auditable.
Low-FODMAP swaps for oyster sauce
Craving oyster sauce during elimination? These low-FODMAP picks from the same food group let you keep the dish without the trigger.
Related foods
This page is for informational purposes only and is not medical advice. FODMAP content varies with ripeness, processing, and brand. Always work with your doctor or a registered dietitian on dietary changes for IBS.