Tomato (fresh)
Vegetables · Nightshades
Yes. Fresh tomato is low FODMAP at the tested serve of one small tomato, 75 g, which carries only 0.05 g of fructans and 0.1 g of excess fructose. Tomato has a reputation as an IBS trigger it doesn’t quite deserve: you need one large tomato, 200 g, before the rating moves to amber.
Last updated 3 September 2026Serving sizes for tomato (fresh)
One small tomato (75 g) is rated green. One large tomato (200 g) is rated amber.
Tested serving sizes
| Serving | Amount | Main FODMAP | Rating |
|---|---|---|---|
| 1 small tomato | 75 g | Fructose 0.1 g | |
| 1 large tomato | 200 g | Fructose 0.27 g |
Breakdown for 1 tomato
Is tomato (fresh) low FODMAP?
Fresh tomato carries small amounts of two groups. At 75 g the data shows 0.05 g of fructans and 0.1 g of excess fructose, with lactose, GOS, sorbitol and mannitol all at zero. Scale up to one large tomato at 200 g and those figures climb to 0.13 g of fructans and 0.27 g of fructose, enough to move the serve from green to amber. There is no red point in the data for fresh tomato, which is what separates it from genuinely high FODMAP vegetables like onion, where one tablespoon (10 g) already holds 0.4 g of fructans.
Tomato (fresh) and IBS: what to know
If tomato has felt like a trigger, it is worth separating the fruit from what it usually arrives with. Tomato is acidic, and acidity can stir up reflux and burning that has nothing to do with fermentation. Cooked tomato dishes are also built on onion and garlic, and one small clove of garlic (3 g) carries 0.53 g of fructans, more than ten times the 0.05 g in a whole small tomato. Skins and seeds can feel rough on a sensitive gut, but passing a sauce through a sieve is a texture fix rather than a FODMAP one.
Gut-friendly ways to eat tomato (fresh)
Tomato is easy to keep gut friendly: sliced into salads, roasted whole alongside other vegetables, or simmered into a sauce with basil, olive oil and garlic-infused oil. Watch which tomato you are reaching for, because the concentrated and processed forms have their own entries and their own serve sizes. Sun-dried tomato and tomato paste are measured by the spoon rather than by the piece, canned tomato is rated on its own tested serve, and cherry tomatoes are counted individually. Check each on its own page rather than assuming the fresh figures carry across.
Frequently asked questions
Are tomatoes high FODMAP?
No. Fresh tomato is rated green at one small tomato, 75 g, where it carries just 0.05 g of fructans and 0.1 g of excess fructose. The only other tested point, one large tomato at 200 g, is rated amber rather than red. Tomato sits among the more forgiving vegetables for IBS, not among the risky ones.
How many tomatoes can I eat with IBS?
The data covers two points: one small tomato (75 g) rates green and one large tomato (200 g) rates amber. A small tomato in a salad is a comfortable serve, while building a meal around several large ones pushes past the green point. If tomato turns up at most of your meals, spread it across the day rather than stacking it into one plate.
Why do tomatoes seem to trigger my IBS?
Usually it is the company they keep. Cooked tomato dishes are built on onion and garlic, both of which carry far more fructans than the tomato itself, which holds only 0.05 g at a small 75 g serve. Acidity is the other suspect: tomato is sharp, and acid can provoke reflux-style symptoms that have nothing to do with FODMAPs.
Is tomato pasta sauce low FODMAP?
It depends on what went in beside the tomato. Fresh tomato is green at 75 g, so a sauce simmered from tomatoes, herbs, olive oil and garlic-infused oil stays gut friendly. Jarred sauces are the usual problem, since most list onion and garlic near the top. Portion counts too, because a sauce reduces several tomatoes down onto one plate.
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