Green Onions
Allium fistulosum
Moderate FODMAP
Portion Sensitive
Allium Family
Fresh green onions with white bulbs and long green stalks

FODMAP/SIBO Rating

Be careful

Serving Size Consideration: One tablespoon, chopped (3-4g)

Safe Serving Size: Green parts only: up to 1/2 cup (25g)

Active Compounds: Fructans and fructo-oligosaccharides (FOS), particularly concentrated in the white bulb portion

Fermentation Level:
Moderate

Digestive Impact

Why it's problematic: White bulb portion contains higher levels of FODMAPs

Specific symptoms: Bloating, gas, abdominal pain, and digestive discomfort

Typical reaction time frame: Typically within 30 minutes to 4 hours after consumption

Individual variation: Tolerance varies significantly between individuals, especially for the green tops

Safe Alternatives

Substitution ratio: Use equal amounts of green herbs as replacement

Processing Effects

Using only the green tops significantly reduces FODMAP content

Cooking does not reduce FODMAP content

Stacking Considerations

Avoid combining with:

  • garlic
  • onion
  • leeks
  • shallots

Safe complementary foods: Can be safely combined with most low FODMAP vegetables and proteins

Reintroduction Guidelines
  1. Start with small amounts (1 tablespoon) of green parts only
  2. If tolerated, gradually increase portion size of green parts
  3. Test white parts separately, starting with 1 teaspoon
  4. Wait 24 hours between tests to monitor reactions

Signs of success: No digestive symptoms within 24 hours after consumption

Hidden Sources

Common products containing garlic:

  • Asian cuisine
  • Salad dressings
  • Garnishes
  • Prepared soups

Alternative names: Scallions, Spring onions, Chinese onions, Welsh onions

Individual Variables

Factors affecting tolerance:

  • Overall digestive health
  • Portion size consumed
  • Part of plant used (green vs white)
  • Individual FODMAP tolerance
  • Stress levels

Tip: Start with small portions of green parts only and monitor your body's response