Are Walnuts High In Fodmaps

Walnuts are high in FODMAPs, but only when you eat more than a small handful.

 

If you’ve been asking “are walnuts high in FODMAPs” because your stomach gets gassy or bloated after snacking on them, the answer depends entirely on portion size.

 

In this post, we’ll break down whether walnuts are high in FODMAPs, why they can trigger symptoms, and how to enjoy them without wrecking your gut.

 

Let’s get into it.

 

Are Walnuts High in FODMAPs?

Walnuts are high in FODMAPs once you go past a small serving, and here’s why:

 

1. Walnuts Contain Excess Fructans

The main reason walnuts are high in FODMAPs is because they contain fructans.

 

Fructans are a type of oligosaccharide that falls under the “O” in FODMAP.

 

Your small intestine can’t fully absorb fructans, so they travel down to your colon where gut bacteria ferment them.

 

That fermentation is what causes gas, bloating, and cramping in people with IBS or FODMAP sensitivity.

 

So yes, walnuts being high in FODMAPs comes down to their fructan content.

 

2. Walnuts Also Contain GOS

On top of fructans, walnuts contain galacto-oligosaccharides, or GOS.

 

GOS is another FODMAP group that your body struggles to digest.

 

Just like fructans, GOS gets fermented by bacteria in your gut.

 

This double hit of fructans and GOS is exactly why walnuts are high in FODMAPs when eaten in larger amounts.

 

3. Portion Size Determines the FODMAP Load

Here’s the good news: walnuts are high in FODMAPs only above a certain threshold.

 

According to Monash University, a serving of 10 walnut halves (about 30 grams) is low in FODMAPs.

 

Go beyond that, and walnuts become high in FODMAPs.

 

So the question “are walnuts high in FODMAPs” really has two answers: not at 10 halves, but yes at larger servings.

 

Portion control is everything when it comes to walnuts and FODMAPs.

 

Why Walnuts Can Trigger Gut Symptoms

Walnuts are high in FODMAPs, and that’s why they can trigger symptoms in sensitive people.

 

But there are a couple of other reasons walnuts cause digestive trouble too:

 

1. High Fat Content Slows Digestion

Walnuts are packed with fat, which slows down digestion.

 

For some people, that slower transit time can cause bloating and discomfort.

 

So even if walnuts weren’t high in FODMAPs, the fat alone can be an issue.

 

2. Fiber Adds to the Fermentation Load

Walnuts are rich in fiber, and fiber ferments in the colon just like FODMAPs do.

 

Since walnuts are high in FODMAPs and high in fiber, eating too many creates a perfect storm for gas.

 

If you have IBS, this combo is worth watching closely.

 

How to Eat Walnuts on a Low FODMAP Diet

Walnuts are high in FODMAPs in big servings, but you can still enjoy them on a low FODMAP diet with these tips:

 

1. Stick to 10 Halves Per Serving

Ten walnut halves is the sweet spot where walnuts are not high in FODMAPs.

 

Measure them out instead of eating straight from the bag.

 

That way you enjoy walnuts without crossing into high FODMAP territory.

 

2. Space Out Your Servings

FODMAPs stack up throughout the day.

 

Even though walnuts are high in FODMAPs only in larger portions, eating them alongside other fructan-rich foods can push you over your limit.

 

So keep track of what else is on your plate.

 

3. Try Walnut Butter Carefully

Walnut butter is concentrated, so it’s easier to eat more without realizing it.

 

A small spoonful is usually fine, but large amounts mean walnuts are high in FODMAPs again.

 

Read labels too, since some brands add high FODMAP sweeteners.

 

4. Watch for Personal Triggers

Some people tolerate walnuts better than others, even when walnuts are high in FODMAPs.

 

Keep a food diary and note how you feel after eating them.

 

Your gut is the best judge of what works for you.

 

So, Are Walnuts High in FODMAPs?

Walnuts are high in FODMAPs when you eat more than about 10 halves.

 

That’s because of their fructan and GOS content.

 

But in small servings, walnuts are low in FODMAPs and totally fine for most people.

 

So if you’ve been wondering “are walnuts high in FODMAPs,” now you know the answer depends on your portion.

 

Keep it to a small handful, and you can enjoy walnuts without the bloating.