Should I Follow the Low FODMAP Diet for IBS? A functional Medicine and Nutrition Perspective.

Jen Smith
9 hours ago
4 min read

If you've been diagnosed with IBS, chances are you've come across the Low FODMAP diet. It's often described as one of the most effective dietary approaches for managing IBS symptoms, and for many people it can provide significant relief.

But does everyone with IBS need to follow it?

The short answer is no.

From a functional medicine perspective, the Low FODMAP diet is one possible tool—not the starting point for everyone and certainly not a diet intended to be followed indefinitely.

Understanding when it's appropriate, and just as importantly when it isn't, can help you avoid unnecessary food restrictions while making meaningful progress with your symptoms.

What is the Low FODMAP diet?

The Low FODMAP diet was developed by researchers at Monash University to help reduce IBS symptoms.

FODMAPs are certain types of carbohydrates that can be poorly absorbed in the small intestine. When they reach the large intestine, they're fermented by gut bacteria, producing gas and drawing water into the bowel.

For people with IBS, this can contribute to symptoms such as:

Bloating
Abdominal pain
Excessive wind
Diarrhoea
Constipation
Changes in bowel habits

When isn't it the right approach?

Introducing Low FODMAP foods for a short period can often reduce these symptoms.

But here's the problem many people face. There are approximately 100–200 commonly identified FODMAP-containing foods, and when different varieties and preparations are included, this number can easily exceed 300. This highlights the importance of identifying your individual triggers, as FODMAP sensitivity is highly personal. Attempting to avoid all FODMAP-containing foods would be unnecessarily restrictive, nutritionally challenging, and unlikely to reflect your specific tolerance levels. 'Blanket elimination' because a food 'might' cause you an issue is unlikely to take you any further forward with relief in the long term.

When can the Low FODMAP diet be helpful?

Research has shown that the Low FODMAP diet can be an effective way of reducing IBS symptoms for many people.

It may be particularly helpful if you experience:

Significant bloating after meals.
Excessive gas.
IBS symptoms linked to certain fruits, vegetables or grains.
Symptoms that haven't responded to simpler dietary changes.

For many people, reducing FODMAP intake provides valuable symptom relief while allowing time to investigate what else may be contributing to IBS.

When isn't it the right approach?

The Low FODMAP diet isn't appropriate for everyone.

If your IBS symptoms are being driven primarily by chronic stress, poor sleep, gut-brain axis dysfunction, eating habits or impaired digestion, removing FODMAP-containing foods may only provide limited benefit.

It's also worth remembering that not everyone reacts to the same foods.

Following a highly restrictive diet simply because you've been diagnosed with IBS may lead to unnecessary limitations without addressing the real factors driving your symptoms.

Why it shouldn't become a permanent diet.

This is one of the most important points.

The Low FODMAP diet is designed to have three stages:

Elimination.
Systematic reintroduction.
Personalisation.

The elimination phase is only intended to be temporary.

Unfortunately, many people stop after the first stage and continue avoiding dozens of foods for months or even years.

That isn't how the diet was designed to be used.

Long-term restriction can reduce dietary variety, make eating more stressful and may even affect the diversity of your gut microbiome.

The goal is never to avoid as many foods as possible.

The goal is to identify the specific FODMAPs that trigger your symptoms while reintroducing everything else you can comfortably tolerate.

Food isn't always the whole story.

One of the biggest misconceptions about IBS is that food is always the primary problem.

While food can certainly trigger symptoms, it isn't always the reason your digestive system has become sensitive.

When I work with clients, I also consider questions such as:

Are you digesting food effectively?
Are you eating in a relaxed state or rushing meals?
Could stress be influencing your gut-brain axis?
Is your gut microbiome playing a role?
Are poor sleep or lifestyle factors affecting digestion?
Are there other drivers that need addressing alongside food?

Looking at the bigger picture often provides a much clearer understanding of why symptoms persist.

A different way to think about FODMAPs.

Many people assume: Food = Problem

But often it’s more like:

Food + sensitivity + stresss + poor sleep + nervous system dysregulation = symptoms

FODMAPs may contribute to symptoms, but they are rarely the whole story.

Our goal is not perfection. In functional medicine, our goal is understanding, flexibility, and gradually building confidence around food again.

A personalised approach is always best.

IBS is a syndrome, which means no two people experience it in exactly the same way.

One person may benefit enormously from a Low FODMAP approach.

Another may see little improvement until stress, digestion or other underlying factors are addressed.

This is why I encourage people to become curious rather than simply following another list of foods to avoid.

Tracking symptoms, identifying patterns and taking a structured, personalised approach is far more valuable than adopting blanket dietary restrictions.

Should you try the Low FODMAP diet?

For some people, yes.

For others, it may not be necessary.

The important question isn't simply:

'Should I go Low FODMAP?'

It's:

'Is this the right tool for my IBS at this stage?'

Like any therapeutic intervention, it works best when it's used for the right reasons, in the right way and as part of a broader understanding of your digestive health.

Take the confusion out of the Low FODMAP diet.

If you've ever looked at the Low FODMAP diet and thought, 'Where do I even start?', you're not alone. In IBS Unlocked, you'll be guided through each FODMAP category in a clear, practical way, helping you understand which foods are most likely to be triggering your symptoms—and which probably aren't.

You'll learn how to follow the elimination phase correctly, use symptom tracking to identify the right foods to challenge, reintroduce foods systematically, and gradually rebuild your personal tolerance wherever possible. The goal isn't long-term restriction—it's helping you create the most varied, enjoyable diet your gut can comfortably tolerate.

This isn't just another list of foods to avoid. It's a step-by-step guide to understanding your own unique triggers, so you can make confident food choices without unnecessary fear or confusion.

Buy your copy of IBS unlocked here: