Are Tomatoes Low FODMAP? Tomatoes & the Low FODMAP Diet, Explained

Yes, tomatoes are low FODMAP in small servings. A single small tomato (approximately 65g) is considered low FODMAP. Larger servings may become high FODMAP because excess fructose can accumulate beyond low FODMAP thresholds.

Tomato-based products such as canned tomatoes, ketchup, and tomato paste may also be low FODMAP when consumed in the serving sizes tested and recommended by Monash University.

Many people don’t bother to think twice about tomatoes until their doctor says they can’t have them.

This isn’t shocking in the slightest, seeing as how so many types of foods contain at least a tiny portion of the bright-red fruit, from fresh salads to BBQ sauce.

But what about the 10-15% of people in the world with irritable bowel syndrome? Is it safe for them to consume tomato-based products? Are tomatoes FODMAP?

You see, there are certain foods that have been closely associated with IBS, including dairy and gluten. But when it comes to the nightshade fruit we all know as tomatoes, can someone with IBS partake, or should it go in the bin?


WHAT IS FODMAP?


First, it’s important to know what FODMAPs are.

The acronym stands for fermentable oligo-, di-, monosaccharides, and polyols. These are short-chain carbs that can be hard to digest for some.

 FODMAPs are more likely to reach the end of your intestine, where you’ll find most of your gut bacteria.

The gut bacteria munch on the carbs, and as a result, they can start producing heightened levels of hydrogen gas, possibly leading to digestive issues in IBS patients.

This may cause your intestine to expand, resulting in the typical IBS symptoms, such as pain and bloating.

WHO WILL BENEFIT
FROM A LOW FODMAP DIET?

A low FODMAP diet—one that doesn’t include high FODMAP ingredients like certain fruits, vegetables, dairy, cereals, and sweeteners—may help IBS patients deal with their symptoms.

The low FODMAP diet put together by Monash University is specifically designed for those who have been medically diagnosed with IBS.

Please note that other similar gastrointestinal disorders, such as coeliac disease and endometriosis, do not fall into this category.



ARE TOMATOES FODMAP
FRIENDLY?


People with IBS have to be extremely careful about the kinds of foods that go into their bodies. Foods that contain high FODMAP levels, such as dairy and gluten, may contribute negatively to IBS, but what about tomatoes? Are tomatoes FODMAP friendly?

We’ve got excellent news for IBS patients who can’t stop munching on the bright-red fruit!

Yes! Tomatoes are indeed FODMAP-friendly!

However, IBS patients should still be wary of tomatoes and tomato-based products.

You see, while tomatoes can be FODMAP friendly, that doesn’t mean those with digestive disorders should pick them off the vine and begin munching away. Tomatoes contain fructose, which is a FODMAP.

So, while tomatoes can be FODMAP friendly, IBS patients may want to refrain from consuming more than one small tomato per serving, just to be on the safe side. 



ARE PRODUCTS
CONTAINING TOMATO
LOW FODMAP?


Alright, so we’ve established that tomatoes, or at least tiny quantities of tomatoes, are FODMAP friendly. But what about products like canned tomatoes and ketchup? Are these products containing tomato, low FODMAP?

Again, the answer to this question is “Yes!”

But does that mean you should drown your french fries in ketchup, your steaks in A1 sauce, and eat Bolognese sauce like there’s no tomorrow?

Of course, not. After all, we hope there will be a tomorrow, right?

What it boils down to is portion size. Low FODMAP foods are only low FODMAP if you don’t overindulge. 2 tablespoons of BBQ sauce or ketchup can be fine, but if you go overboard, your gut (and your underpants) may be in trouble.

Monash University, the leader of FODMAP research, has tested several types of tomato-based products and concluded the following portion sizes to be ideal:

• Canned tomatoes: 92 g per serving
• Ketchup: 13 g per serving (unsweetened only)
• Tomato paste: 28 g per serving
• Tomato sauce: 13 g per serving

The thing about tomato-based products is that while the tomato content may not be inherently destructive toward your digestive tract, at least in small amounts, the other ingredients may be.

So, to address the store-bought stuff: is tomato sauce low FODMAP? And are canned tomatoes low FODMAP? They certainly can be if they don’t contain ingredients like high-fructose corn syrup, onions, and garlic, which fall in the high FODMAP category. Your best bet is to avoid these types of condiments and sauces or to prepare your own meals and ingredients.



FINAL THOUGHTS

So, to put the question of “are tomatoes low FODMAP?” to rest, yes, they are, but IBS patients may still tolerate tomatoes and certain tomato-based products in tiny quantities per serving.

What some medical experts suggest to their IBS patients is to eliminate certain foods from their diets for a short period of time. For instance, try refraining from eating tomatoes completely for a week or two. You can incorporate tomatoes into your diet after the test period to see how your body responds.

If you think you suffer from IBS, you should seek advice from a trained medical professional to determine whether or not you need to pay close attention to your FODMAP intake. 


Managing IBS Symptoms

If you are managing IBS alongside a low FODMAP diet, you may be interested in some of the emerging research surrounding gut health and the microbiome. Molecular hydrogen has attracted growing scientific interest for its relationship to digestive health, gut bacteria, and cellular processes associated with the gastrointestinal system.

While research is ongoing, these areas have helped make molecular hydrogen one of the fastest-growing fields of study in digestive and metabolic wellness.

Learn about Molecular Hydrogen Tablets.

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