IBS Treatment & The Low FODMAP Diet

By ,

Living with IBS can feel frustrating, unpredictable and exhausting.

You might feel fine one day but then bloated, uncomfortable or urgently searching for a bathroom the next. You may have tried cutting gluten, dairy or random foods without clarity, and still feel like nothing helps. You might need to have a chat with me: Lauren Davidson.

As an Accredited Practising Dietitian at OnePointHealth Sydney with additional training in the Monash University Low FODMAP Diet for dietitians, I specialise in structured, evidence-based IBS treatment designed to reduce symptoms without unnecessary long-term restriction.

My passion is helping people in Sydney improve their gut health and overall wellbeing while still enjoying food day to day.

Lauren dietitian sitting at computer chatting with patient

How Common Is IBS?

Irritable Bowel Syndrome is estimated to affect between 3.8–9.2% of the global population. It is more common in women than men and is most often diagnosed before the age of 50.

gastrointestingal nutrition

Despite being common, IBS is frequently underdiagnosed in Sydney.

When IBS goes undiagnosed, people are often left feeling:

  • Anxious about their symptoms
  • Frustrated by normal test results
  • Searching for an “organic” cause
  • Unsure which treatments are evidence-based

This uncertainty can significantly affect quality of life.

The reassuring part? IBS is very manageable with the right approach.

What Causes IBS?

The exact cause of IBS is not fully understood. It is likely multifactorial, meaning several mechanisms contribute.

Proposed contributing factors include:

  • Altered gastrointestinal motility (how quickly or slowly the gut moves)
  • Visceral hypersensitivity (increased sensitivity to normal digestive processes)
  • Altered brain–gut communication
  • Low-grade inflammation
  • Immune system activation
  • Increased intestinal permeability
  • Changes in the gut microbiota

IBS is considered a disorder of gut–brain interaction, not a structural disease. The digestive tract often appears normal on testing, but its function is altered.

This does not make symptoms “in your head.” The symptoms are real, but the good news is that they are treatable with accredited help.

Major IBS Symptoms

Common IBS symptoms include:

  • Lower abdominal pain
  • Altered bowel habits (diarrhoea, constipation, or a combination of both)
  • Bloating (often described as feeling like there is an inflated balloon in the abdomen)
  • Excessive wind (gas)
  • Visible abdominal distension

Symptoms often wax and wane. Severity can vary between individuals and even fluctuate within the same person.

This unpredictability is often what patients find most distressing.

The Low FODMAP Diet for IBS

One of the most well-researched dietary approaches for IBS is the low FODMAP diet, developed by researchers at Monash University Australia.

FODMAP is an acronym for Fermentable Oligo-, Di-, Mono-saccharides and Polyols. These are specific types of carbohydrates that are poorly absorbed in the small intestine and easily fermented by gut bacteria.

clark douglas vepjdauitq4 unsplash

In people with IBS, FODMAPs can:

  • Trigger bloating, abdominal pain and altered bowel habits
  • Draw extra water into the bowel
  • Be rapidly fermented by gut bacteria
  • Increase gas production

FODMAPs are found in a wide variety of everyday foods, including certain fruits and vegetables, wheat-based breads and cereals, legumes, nuts, dairy products, processed foods and some sweeteners.

When the low FODMAP diet is implemented correctly, approximately 70% of people with IBS experience symptom improvement.

Importantly, the low FODMAP diet is not meant to be permanent. It is a structured, three-step process.

The 3-Step Low FODMAP Approach to Treating IBS

The low FODMAP diet is a structured, short-term strategy that is not meant to be a lifelong elimination diet. It helps understand where the IBS can be triggered from and how we can improve the symptoms based on your personal makeup.

Step 1: Short-Term Reduction (2–6 weeks)

High FODMAP foods are temporarily reduced to see whether symptoms improve.

Step 2: Systematic Reintroduction

Individual FODMAP groups are re-tested one at a time to identify personal triggers.

Step 3: Personalisation (Long-Term)

Well-tolerated foods are reintroduced, and only specific triggers are limited — creating a balanced, sustainable way of eating.

The goal is always symptom relief with as much dietary variety as possible.

Why Work With an IBS Dietitian at OnePointHealth?

Many people attempt the low FODMAP diet independently and:

  • Remain overly restricted
  • Skip the reintroduction phase
  • Misinterpret symptoms
  • Develop increased food anxiety

Working with a trained IBS dietitian in Sydney ensures the process is:

  • Sustainable
  • Structured
  • Nutritionally adequate
  • Evidence-based
  • Individualised, this is huge because diet and IBS is not a one-size-fits-all situation
Lauren the dietitian chatting through food options

At OnePointHealth Sydney, my approach is calm, practical and personalised. We don’t promote extreme restriction, fear based or restrictive advice, or guesswork. We care about making you healthy and happy at the same time for long term, sustainable results.

Instead, we identify patterns, test tolerance methodically, and build confidence around food again.

Book an IBS Consultation at OnePointHealth

IBS can significantly impact quality of life but with the right guidance and a structured approach, most people experience long term improvement.

If you’re dealing with bloating, abdominal pain, unpredictable bowel habits, or suspect IBS may be contributing to your symptoms, you don’t have to navigate it alone. Personalised nutrition support can help you feel more comfortable, more confident, and less anxious around food.

If you’re ready for clarity and a plan that actually makes sense for your body, I’d love to support you. Book an appointment at OnePointHealth Sydney to diagnose and treat your IBS symptoms and let’s work through it together.

clark douglas vepjdauitq4 unsplash

IBS Treatment FAQ’s | OnePointHealth Sydney

What is the best diet for IBS?

This is important: there is no single “IBS diet” that works for everyone.

The most researched dietary therapy for Irritable Bowel Syndrome is the low FODMAP diet, developed by researchers at Monash University.

However, IBS management is highly individual. Some people benefit from FODMAP modification, while others may need support with fibre balance, meal timing, gut–brain strategies, or food anxiety.

An IBS dietitian can help determine the most appropriate approach based on your specific symptoms.

Should I try the low FODMAP diet on my own?

The low FODMAP diet is designed to be followed in three structured stages and is not intended as a long-term elimination diet.

Many people who attempt it alone:

  • Remain overly restricted
  • Skip the reintroduction phase
  • Cut foods unnecessarily
  • Struggle to interpret symptoms

Working with an IBS dietitian at OnePointHealth ensures the diet is nutritionally adequate, structured and personalised, with the goal of expanding your diet over time.

How long does the low FODMAP diet take to work?

The initial low FODMAP phase typically lasts 2–6 weeks.

If symptoms are going to improve, this usually occurs within that timeframe. If there is no improvement after this structured period, alternative strategies are explored.

The reintroduction and personalisation phases take longer, as they involve systematic food testing to identify individual tolerance levels.

Can IBS be cured?

IBS is considered a chronic condition, but symptoms can be significantly improved and well managed.

Many people experience long periods of symptom control with:

  • Structured dietary therapy
  • Fibre optimisation
  • Stress regulation
  • Consistent eating patterns
  • Personalised FODMAP reintroduction

The aim of IBS treatment is long-term symptom control and improved quality of life — not lifelong restriction.

What are the main symptoms of IBS?

Common IBS symptoms include:

  • Lower abdominal pain
  • Bloating
  • Constipation
  • Diarrhoea
  • Alternating bowel habits
  • Excess gas
  • Visible abdominal distension

Symptoms often fluctuate over time and can vary in severity.

Is bloating always IBS?

No. While bloating is a common symptom of IBS, it can also be caused by:

  • Food intolerances
  • Coeliac disease
  • Inflammatory bowel disease
  • Small intestinal bacterial overgrowth (SIBO)
  • Hormonal factors
  • Constipation

If you are unsure about the cause of your symptoms, a proper assessment by a doctor is important before starting any dietary restriction.

How do I know if I should see an IBS dietitian?

You may benefit from seeing an IBS dietitian at OnePointHealth if you:

  • Experience frequent bloating or abdominal pain
  • Have been diagnosed with IBS
  • Have irregular bowel habits
  • Feel unsure which foods trigger symptoms
  • Have tried elimination diets without clear improvement

A structured, evidence-based approach can help you stop guessing and start feeling more confident around food.

Does IBS affect the gut microbiome?

Yes. Research suggests that alterations in the gut microbiota may play a role in IBS symptoms.

However, overly restrictive diets can also reduce microbiome diversity.

That’s why the long-term goal of IBS treatment is always dietary expansion and balance without any ongoing restriction.

Can stress make IBS worse?

Yes. IBS is a disorder of gut–brain interaction, meaning stress and emotional factors can directly influence gut function.

What many people don’t realise is that stress can affect:

  • Gut motility
  • Sensitivity to pain
  • Bloating
  • Urgency

For many people, combining dietary therapy with stress regulation strategies significantly improves outcomes.

How do I book an IBS consultation at OnePointHealth?

Appointments for IBS treatment are available at OnePointHealth.

During your consultation, we will:

  • Review your symptoms and history
  • Assess current diet patterns
  • Determine whether the low FODMAP diet is appropriate
  • Develop a structured, personalised plan

Book online or contact the clinic to schedule your appointment. We offer in person and online appointments.