Gut Dysfunction & Food Intolerance
When Your Body Suddenly Stops Tolerating Foods
Many people reach a point where eating begins to feel unpredictable.
Foods that were once tolerated suddenly trigger symptoms like:
• bloating
• abdominal discomfort
• fatigue after meals
• brain fog
• skin flare-ups
• headaches
• sinus congestion
• digestive irregularity
At first it may seem like a specific food is the problem. But over time, people often notice the list of “trigger foods” keeps growing.
This pattern is commonly described as food intolerance or food sensitivity.
At How It Heals in Brisbane, we investigate why the body may have lost tolerance to certain foods in the first place.
What Is Food Intolerance?
A food intolerance occurs when the body struggles to properly process certain foods.
Unlike immediate allergic reactions, food intolerance symptoms are often delayed and may appear hours after eating.
Common symptoms include:
• persistent bloating
• digestive discomfort
• fatigue after meals
• brain fog
• skin irritation
• headaches
• fluctuating energy levels
Because symptoms can be delayed, identifying the trigger food without investigation can be difficult.
This is why some people begin searching for food intolerance testing or ways to check food intolerances.
Food Sensitivity vs Food Allergy
Food allergies and food intolerances are different processes.
Food allergies involve a rapid immune reaction and can produce severe symptoms.
Food intolerances and food sensitivities are often more subtle and may involve digestive, metabolic, or immune signalling pathways.
From a terrain perspective, the key question becomes:
Why has the body lost tolerance to certain foods?
Rather than simply removing foods indefinitely, we investigate the biological terrain influencing digestive tolerance.
Why Food Sensitivities Develop
Food reactions often appear when the digestive system becomes stressed or dysregulated.
Several systems influence food tolerance:
• gut microbiome balance
• digestive enzyme function
• intestinal barrier integrity
• inflammation within the gut
• nutrient deficiencies affecting digestion
• detoxification pathways
When these systems are disrupted, foods that were once tolerated may begin triggering symptoms.
Food Intolerance Testing
Organic Acids Test (OATS)
The Organic Acids Test provides insight into metabolic pathways related to gut microbes, mitochondrial energy production, and nutrient metabolism.
Disruptions in these systems can influence digestive tolerance and contribute to symptoms such as fatigue, brain fog, and food reactivity.
Comprehensive Gut Testing
Gut testing can help identify microbial imbalances, inflammation, and digestive dysfunction that may contribute to food sensitivities.
This type of investigation can help explain why certain foods suddenly begin triggering symptoms.
Hair Tissue Mineral Analysis (HTMA)
Mineral balance influences digestive enzyme activity, detoxification pathways, and stress resilience.
HTMA can reveal metabolic patterns that influence digestion and immune tolerance.
Investigating the Root Cause
If food sensitivities appear persistent or difficult to identify, we may explore deeper investigation using functional testing.
These tests help us understand how digestion, metabolism, and microbial signalling may be influencing food tolerance.
Food Sensitivity Testing
Many people react to foods without a clear immediate allergy. Symptoms can appear hours or even days later, making the trigger difficult to identify.
When needed, we may investigate food reactions using food sensitivity testing to help identify patterns of immune or digestive reactivity.
This can help explain symptoms such as:
• persistent bloating
• brain fog after eating
• skin flare-ups
• headaches linked to foods
• fatigue following meals
Rather than simply eliminating foods indefinitely, testing can help guide a more targeted strategy to restore digestive tolerance.
Gluten Intolerance & Digestive Reactions
Some individuals experience symptoms related to gluten intolerance, including:
• bloating
• digestive discomfort
• fatigue after meals
• brain fog
In some cases this may involve coeliac disease, while in other situations the reaction may reflect broader digestive dysfunction or immune activation.
Investigating digestive terrain can help clarify what may be contributing to these reactions.
Signs Your Symptoms May Be Linked To Food Intolerance
You may benefit from investigation if you experience:
• persistent bloating after meals
• fatigue or brain fog following certain foods
• skin reactions linked to diet
• headaches triggered by foods
• increasing food restrictions over time
• digestive discomfort that appears unpredictable
These symptoms often reflect deeper digestive or metabolic patterns that require investigation rather than simple food avoidance.
Food Sensitivity Testing Brisbane
How It Heals is a functional nutrition clinic located in Bulimba, Brisbane, specialising in complex digestive, hormonal, and metabolic health patterns.
Our practitioners investigate symptoms through detailed case history, functional testing, and personalised strategies designed to restore digestive balance and metabolic resilience.
We work with clients locally in Brisbane and across Australia via telehealth consultations.
Book an Initial Consultation
If you are experiencing symptoms that may be linked to food intolerance or digestive dysfunction, an initial consultation can help determine whether deeper digestive or metabolic factors may be involved.
Book an appointment with our team to begin investigating the patterns behind your symptoms.
