Could This Gut-Focused Diet Help Calm Endometriosis Symptoms?
Endometriosis is often thought of as purely a gynaecological condition, but for many women living with it, digestive symptoms are just as disruptive as pelvic pain. Bloating, abdominal discomfort, diarrhoea, constipation, and painful bowel movements are incredibly common, and until recently, there was little research exploring dietary approaches for managing gastrointestinal symptoms in endometriosis, but that's starting to change.
New research suggests that the low FODMAP diet can be a helpful, evidence-based tool for symptom management in a significant proportion of women with endometriosis, particularly those experiencing gut-related symptoms.
What Is Endometriosis?
Endometriosis is a chronic inflammatory condition where tissue similar to the lining of the uterus grows outside the uterus. These growths can be found on the ovaries, fallopian tubes, pelvic lining, bowel, or other structures within the pelvis. Because this tissue responds to hormonal changes, it can trigger inflammation, pain, and scarring over time. Endometriosis affects an estimated 1 in 10 women of reproductive age, although many cases remain undiagnosed for years due to the variability of symptoms and delays in diagnosis.
Common Symptoms of Endometriosis
While pelvic pain and painful periods are often considered hallmark symptoms, endometriosis can present very differently from one person to another. Common symptoms include:
Severe painful periods
Heavy bleeding
Pelvic pain
Pain during or after sex
Fatigue
Fertility challenges
Gastrointestinal symptoms such as bloating, abdominal pain, diarrhoea, constipation, nausea, and painful bowel movements
What Causes Endometriosis?
The exact cause of endometriosis isn’t fully understood. Current theories include retrograde menstruation, immune dysfunction, genetic predisposition, and altered inflammatory responses. What is clear is that endometriosis is a complex, whole-body condition, not just a reproductive one, and symptoms are influenced by hormonal, immune, nervous system, and inflammatory pathways.
The Overlap Between Endometriosis and IBS
Women with endometriosis are significantly more likely to meet criteria for irritable bowel syndrome (IBS) than the general population. In fact, around 3/4 of women with endometriosis report gastrointestinal symptoms, including abdominal pain, bloating, gas, diarrhoea, and pain when opening their bowels .
In practice, this overlap often leads to individuals being told they have IBS when, in reality, their gut symptoms may be driven by endometriosis itself, by shared mechanisms such as visceral hypersensitivity, altered gut–brain signalling, and inflammation.
What Is the Low FODMAP Diet?
The low FODMAP diet is a clinically researched dietary approach originally developed for IBS. FODMAPs are types of carbohydrates that are poorly absorbed in the small intestine and rapidly fermented by gut bacteria, which can lead to gas production, bloating, pain, and altered bowel habits in sensitive individuals.
Foods high in FODMAPs include wheat and rye, onions and garlic, legumes, certain fruits such as apples, pears, and mango, dairy products high in lactose, and sweeteners such as honey and sugar alcohols.
The diet is not intended to be lifelong or overly restrictive. Instead, it follows a structured process with three phases.
Elimination: temporarily reducing high FODMAP foods to calm symptoms
Reintroduction: systematically testing individual FODMAP groups to identify personal triggers
Personalisation: expanding the diet as much as possible while keeping symptoms manageable
How Can the Low FODMAP Diet Help With Endometriosis?
A recent randomised, controlled clinical trial has shown that 6 in 10 women with endometriosis experienced meaningful improvement in gastrointestinal symptoms when following a low FODMAP diet, compared with a control diet. Improvements were seen in bloating, abdominal pain, stool consistency, and overall quality of life.
It’s important to note that the low FODMAP diet does not treat endometriosis itself. Instead, it helps reduce digestive symptoms by decreasing gut fermentation and intestinal distension – mechanisms thought to amplify pain and discomfort in people with visceral hypersensitivity, which is common in endometriosis.
In my clinic, I use the low FODMAP diet as a symptom-management tool – not a cure, and not a one-size-fits-all solution. The aim is always to improve quality of life while maintaining nutritional adequacy and dietary variety. Many clients with endometriosis arrive already restricting foods in an attempt to control symptoms – in those cases, the low FODMAP approach is often used to bring clarity, reduce fear around food, and safely reintroduce a wider range of foods over time.
Why Professional Guidance Matters
While the low FODMAP diet is evidence-based, it is also nuanced. When followed without guidance, it can become unnecessarily restrictive, nutritionally imbalanced, or poorly executed – which can worsen symptoms rather than improve them.
Working with a nutritionist trained in the low FODMAP approach ensures the diet is applied correctly, tailored to the individual, and followed for the appropriate length of time. It also allows space to address other factors that influence symptoms, such as gut motility, stress, nervous system regulation, and hormonal changes across the menstrual cycle.
Take Away
For women with endometriosis who experience digestive symptoms, the low FODMAP diet is now a well-supported, evidence-based option for symptom management. It won’t be appropriate for everyone, and it’s not a replacement for medical care, but for many, it can be a valuable part of a broader, personalised support plan.
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Words by Marilia Chamon for The Well Edit
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