Is Tomatoes High FODMAP?
Fresh common round tomatoes and Roma tomatoes contain equal ratios of glucose and fructose, making them low FODMAP in standard servings up to 119 grams. However, tomatoes are naturally acidic and contain histamine-liberating compounds. In patients with gastroesophageal reflux or histamine sensitivity, tomato consumption can trigger epigastric burning, reflux, and accelerated bowel motility without colonic fermentation.
1 medium common tomato (119g)
Safe for most sensitive digestive tracts
Sun-dried tomatoes (>16g) or Tomato paste with garlic
Exceeds colonic tolerance limit
2 hours
1 to 4 hours (acid or histamine trigger)
How Tomatoes affects your digestive tract
Tomatoes have a low pH (4.3-4.9) that can irritate gastric mucosa and relax the lower esophageal sphincter. Fructose is absorbed normally because it is balanced equimolarly with glucose.
Common symptom manifestations
Gentle alternatives to Tomatoes
Strictly low FODMAP at 1 medium tomato (119g).
Safe up to 100g if free of added onion or garlic.
Sweet, low-acid vegetable that adds red color without gastric burning.
Test your personal tolerance for Tomatoes
FODMAP tables provide population averages. Some people tolerate Tomatoes without issues, while others react to small trace amounts.
GutLog 1.5.6 includes an Active Diet Tracker with a 3-Phase Elimination Stepper. Test individual food challenge groups with automatic 3-day washout countdowns and 4-hour tag deduplication.
- Tests reactions across 6 digestion lag windows (2h to 36h)
- Calculates Poisson arrival baseline rates and lift scores
- Monitors symptom deltas for pain, bloating, and stool form
- Operates 100% on-device with zero cloud health tracking
Frequently asked questions about Tomatoes
Why do tomato sauces trigger IBS flares?
Traditional marinara and pasta sauces contain high amounts of sautéed garlic and onions, which load the sauce with fructans.
Are cherry tomatoes low FODMAP?
Yes, but they contain slightly higher free fructose than large common tomatoes. Safe up to 3 cherry tomatoes (45g).
Does removing tomato seeds reduce acidity?
Removing the gelatinous pulp and seeds reduces total acidity and coarse mechanical fiber slightly, which helps sensitive stomachs.
Track Tomatoes in your daily food log
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