Soy Sauce
Glycine max (fermented)
Contains Wheat
Fermented Food
Contains Soy
Traditional dark soy sauce in a small bowl

FODMAP/SIBO Rating

Be careful

Serving Size Consideration: 1 tablespoon

Safe Serving Size: 2 teaspoons

Active Compounds: Wheat proteins, fermented soy proteins, salt

Fermentation Level:
High

Digestive Impact

Why it's problematic: Can be problematic in larger quantities due to wheat content

Specific symptoms: Bloating, gas, abdominal discomfort

Typical reaction time frame: Usually within 30-60 minutes after consumption

Individual variation: Tolerance varies significantly between individuals

Safe Alternatives

Substitution ratio: 1:1 replacement ratio

Processing Effects

Fermentation reduces some FODMAPs but creates others

High salt content may affect digestive sensitivity

Stacking Considerations

Avoid combining with:

  • miso
  • tempeh
  • seitan
  • wheat bread

Safe complementary foods: Rice, grilled meats, steamed vegetables, and most cooked dishes

Reintroduction Guidelines
  1. Start with 1 teaspoon (5ml) mixed in a full meal
  2. Wait 24 hours to assess tolerance
  3. If no symptoms, increase to 2 teaspoons next time
  4. Build up to standard 2 tablespoon serving size

Signs of success: No digestive discomfort within 24 hours of consumption

Hidden Sources

Common products containing garlic:

  • marinades
  • asian-style dressings
  • stir-fry sauces
  • processed meats

Alternative names: shoyu, light soy sauce, dark soy sauce, tamari

Individual Variables

Factors affecting tolerance:

  • Overall wheat sensitivity
  • Individual fermentation tolerance
  • Portion size consumed
  • Total sodium intake
  • Concurrent consumption of other FODMAPs

Tip: Start with small amounts and monitor your body's response. Some people tolerate small amounts well while others may need to avoid completely.