Leaky Gut & Intestinal Permeability
Support for gut barrier dysfunction, bloating, food reactions and persistent digestive symptoms
“Leaky gut” is a term many people come across when they are trying to understand why their digestion feels so reactive.
They may be bloated after eating. Reacting to foods they used to tolerate. Struggling with reflux, constipation, diarrhoea, nausea, fatigue, skin changes or brain fog. They may have already tried probiotics, gut powders, restrictive diets or “gut healing” protocols, only to feel slightly better for a short time, or sometimes worse.
Clinically I don’t often see gut barrier issues as a standalone problem.
More often, increased intestinal permeability is one part of a bigger digestive pattern involving the microbiome, bowel motility, inflammation, immune reactivity, stress physiology, food tolerance, nutrient status and the way the gut is communicating with the nervous system.
In clinic, I take a careful, evidence-informed approach to suspected leaky gut. Rather than assuming your gut lining is the entire problem, we look at what may be irritating the gut, what may be driving your symptoms, and what needs to change for your digestion to become more stable over time.
What does “leaky gut” actually mean?
Your gut lining is not just a passive tube. It is a highly selective barrier.
It is designed to absorb nutrients from food while helping protect the body from substances that should not easily pass through the intestinal wall.
When people talk about “leaky gut,” they are usually referring to increased intestinal permeability. This means the gut barrier may be more vulnerable or less tightly regulated than it should be.
That does not mean your gut is permanently damaged. It also does not mean every symptom you have is caused by leaky gut.
The more clinically useful question is:
What is placing pressure on the gut barrier in the first place?
That is where the real work begins.
Symptoms that may overlap with gut barrier dysfunction
Gut barrier issues can be difficult to identify from symptoms alone because they often overlap with other digestive conditions.
You may benefit from a more detailed digestive assessment if you experience:
Persistent bloating
IBS-type symptoms
Food reactions or increasing food sensitivity
Constipation, diarrhoea or alternating bowel habits
Reflux, nausea or upper digestive discomfort
Abdominal pain or discomfort after eating
Poor tolerance to fibre, legumes, fermented foods or probiotics
Symptoms that began after food poisoning, gastro, antibiotics or significant stress
A restricted diet because many foods seem to trigger symptoms
Brain fog, fatigue or skin flare-ups that appear to worsen with digestive symptoms
The pattern matters.
A person with constipation, methane-dominant SIBO and poor bowel motility needs a very different plan to someone with diarrhoea, post-infectious IBS and histamine-type reactions.
This is where many generic gut protocols fall apart. They treat “leaky gut” as one condition, when in reality it may be one feature of several very different digestive presentations.
What can contribute to increased intestinal permeability?
Gut barrier function can be affected by several overlapping factors.
In consultation, I am usually looking for the combination of stressors that may be keeping the gut lining irritated, inflamed or poorly regulated.
These may include:
IBS or post-infectious gut changes
SIBO or altered small intestinal motility
Constipation or slow bowel transit
Coeliac disease or gluten-related immune activity
Inflammatory bowel conditions
Gastrointestinal infections
Low dietary diversity
Very restrictive dieting
Poor tolerance to fibre or prebiotic foods
Frequent alcohol intake
Chronic stress or poor sleep
Repeated antibiotic use
Regular use of medications that may irritate the digestive tract
High intake of ultra-processed foods
Ongoing reflux, nausea or upper digestive dysfunction
Gut-brain axis dysregulation
This does not mean every person with bloating or food reactions has leaky gut.
It means your gut barrier may be worth considering when symptoms are persistent, reactive, inflammatory or difficult to resolve with basic dietary changes alone.
Why gut repair protocols often fail
Many people come to naturopathy after already trying to “heal the gut.”
They may have used collagen, bone broth, glutamine, aloe vera, slippery elm, probiotics, fermented foods, digestive enzymes or restrictive elimination diets.
Some of these may be useful in the right context.
But if the underlying driver has not been identified, gut repair supplements can become expensive guesswork.
For example:
If constipation is driving bloating and microbial imbalance, adding more powders may make you feel worse.
If SIBO is present, some prebiotics and probiotics may aggravate symptoms.
If reflux or nausea is prominent, the upper digestive system may need attention before increasing fibre.
If food reactions are escalating, the answer may not be to remove more foods indefinitely.
If stress physiology is a major driver, the gut lining may not settle until the nervous system is also supported.
A better plan starts with understanding the pattern.
The goal is not to throw every gut-healing ingredient at the gut lining.
The goal is to remove the pressure that keeps the gut barrier struggling.
My approach to leaky gut and gut barrier support
At Sara Judd Naturopathy, gut barrier support is approached through a broader digestive lens.
This means your consultation is not just about whether you have “leaky gut.” It is about understanding why your digestive system has become reactive, unstable or difficult to manage.
Your assessment may explore:
Your symptom timeline
Bloating patterns
Bowel habits and transit time
Reflux, nausea or upper digestive symptoms
Food reactions and dietary restriction
Previous infections, gastro or antibiotic use
Stress, sleep and nervous system load
Menstrual or hormone-related symptom changes
Skin, energy and inflammatory patterns
Previous pathology, functional testing or specialist results
Current medications and supplements
Whether further testing is clinically useful
From there, your plan may include dietary guidance, lifestyle support, practitioner supplementation, pathology interpretation and functional testing where appropriate.
The aim is not to overwhelm you with a long protocol.
The aim is to identify the highest-value changes first.
Key areas we may need to address
1. Digestive function
Before focusing on gut lining repair, we need to understand how well digestion is actually working.
This may include stomach acid patterns, reflux, nausea, appetite, meal timing, pancreatic enzyme demand, bile flow, protein tolerance and whether food feels like it “sits” in the stomach for too long.
If digestion is not working well upstream, the lower gut often becomes more reactive downstream.
3. Microbial balance
The microbiome can influence inflammation, immune signalling, short-chain fatty acid production, food tolerance and gut barrier integrity.
But this does not mean everyone needs a probiotic.
For some people, probiotics are useful. For others, especially those with significant bloating or suspected SIBO, the wrong probiotic may aggravate symptoms.
Microbiome support needs to match the person, not the trend.
5. Gut-brain axis and nervous system regulation
The gut barrier is influenced by more than food.
Stress, poor sleep, anxiety, trauma load, overtraining, under-eating and nervous system activation can all affect digestion, motility, sensitivity and immune signalling in the gut.
For some people, gut work fails because the nervous system piece is ignored.
This does not mean symptoms are “all in your head.”
It means the gut and nervous system are biologically connected.
2. Bowel motility
Motility is one of the most overlooked parts of gut health.
Slow transit, constipation and poor small intestinal movement can increase bloating, fermentation and microbial imbalance. In some people, this may contribute to SIBO relapse or ongoing digestive sensitivity.
Supporting the gut lining without addressing motility is often a weak strategy.
4. Food tolerance and dietary diversity
Many people with suspected leaky gut are eating fewer and fewer foods.
This can feel safer short-term, but over time it may reduce fibre variety, microbial diversity and nutrient intake.
The goal is not endless restriction.
The goal is to reduce symptoms while gradually rebuilding tolerance where possible.
6. Targeted gut lining support
Once we understand the broader picture, targeted gut lining support may be appropriate.
This may involve specific nutrients, herbs, dietary strategies or supplemental support aimed at mucosal integrity, inflammation regulation and digestive resilience.
But this should be targeted.
A premium gut plan is not a shopping list.
Testing for leaky gut
There is no single perfect test for “leaky gut,” and testing is not always necessary.
In many cases, it is more clinically useful to investigate what may be driving the digestive symptoms rather than trying to prove intestinal permeability in isolation.
Depending on your presentation, testing may include:
Review of existing blood tests
Coeliac screening
Iron, B12, folate and vitamin D status
Inflammatory markers
Comprehensive stool testing
Markers of digestion, absorption or gut inflammation
Relevant medical investigations through your GP or specialist
Testing should only be recommended when it adds meaningful clinical value.
If a test will not change the plan, it may not be the right next step.
When medical assessment is important
Some symptoms should not be assumed to be leaky gut, IBS or food intolerance.
Please seek medical assessment if you experience:
Blood in the stool
Unexplained weight loss
Persistent vomiting
Fever with digestive symptoms
Severe or worsening abdominal pain
New bowel changes after age 50
Iron deficiency with no clear explanation
Waking overnight with diarrhoea
Difficulty swallowing
A strong family history of bowel cancer, coeliac disease or inflammatory bowel disease
Naturopathic care can work alongside medical care, but these symptoms require appropriate investigation.
Who this approach may suit
This approach may suit you if:
You have persistent digestive symptoms and do not know what is driving them
You have been told you have IBS but still feel unclear about what to do
You react to more foods than you used to
You have tried gut repair supplements without lasting improvement
Probiotics, fibre or fermented foods make you feel worse
You have bloating, constipation, diarrhoea, reflux or nausea that keeps returning
You want a structured plan rather than guessing
You are looking for a clinical naturopath in Maroochydore, on the Sunshine Coast, or via Telehealth
Leaky gut support on the Sunshine Coast
Sara Judd is a clinical naturopath based in Maroochydore on the Sunshine Coast, supporting adults with persistent digestive symptoms including bloating, IBS, SIBO, reflux, constipation, diarrhoea, food reactions and suspected gut barrier dysfunction.
Consultations are available in person on the Sunshine Coast and online via telehealth Australia-wide.
If you are wondering whether leaky gut, intestinal permeability or gut barrier dysfunction may be part of your symptoms, the first step is a detailed digestive assessment.
Book an initial consultation to begin.
Frequently asked questions
Is leaky gut real?
Increased intestinal permeability is a real physiological concept. However, “leaky gut syndrome” is often used loosely and should not be treated as a catch-all diagnosis. I prefer to assess gut barrier function as one possible part of a broader digestive picture.
Can leaky gut cause bloating?
Bloating is usually more complex than leaky gut alone. It may involve SIBO, constipation, IBS, altered motility, food intolerance, gut-brain axis changes, digestive enzyme demand or microbial imbalance. Gut barrier support may be relevant, but the driver of bloating still needs to be assessed.
Can leaky gut cause food intolerances?
Gut barrier dysfunction may overlap with food reactivity, but food intolerances can have several causes. These may include FODMAP intolerance, histamine sensitivity, coeliac disease, immune reactions, enzyme insufficiency, SIBO, inflammation or nervous system sensitivity.
Do I need to cut out gluten and dairy for leaky gut?
Not automatically. Some people benefit from removing specific foods for a period of time, but unnecessary long-term restriction can create its own problems. Food changes should be based on your symptoms, history, testing and clinical pattern.
Do probiotics help leaky gut?
Sometimes. But probiotics are not automatically the right choice. Some people improve with specific strains, while others become more bloated or uncomfortable. The best option depends on your symptoms, bowel pattern, tolerance and whether SIBO or other gut issues are suspected.
What supplements help leaky gut?
There are nutrients and herbs that may support gut lining integrity, but supplements should not be chosen randomly. The more important question is why the gut lining is under pressure. If that driver is missed, supplements are unlikely to create lasting change.
How long does it take to support the gut lining?
This depends on the cause, severity and complexity of your symptoms. Some people notice changes within weeks. Others need a longer, staged approach, especially if SIBO, constipation, post-infectious IBS, food restriction or chronic stress are involved.
Can you help if I have already tried a gut repair protocol?
Yes. Many people have already tried gut repair products before seeking support. Often the issue is not that they failed the protocol. The protocol simply did not match the underlying pattern.