Gut Health and Immunity: Why 70% of Your Immune System Lives in Your Gut
Explore the science behind gut-associated lymphoid tissue and practical strategies to strengthen gut immunity.
Frequent Infections, Autoimmunity & Inflammation
Around 70% of your immune system resides in your gut. If you’re dealing with frequent infections, autoimmune conditions, or chronic inflammation, your gut microbiome may hold the answer. As a gut health practitioner, Elena Rolt uses functional medicine to strengthen immunity from the inside out.

Your gut-associated lymphoid tissue (GALT) is the largest immune organ in your body. The gut lining acts as a barrier, deciding what gets absorbed and what gets eliminated. When this barrier is compromised (leaky gut), undigested food particles and toxins can enter the bloodstream, triggering immune reactions and inflammation. This can manifest as frequent infections, allergies, or even autoimmune conditions where the immune system attacks the body's own tissues.
Do any of these sound familiar?
What might be driving your symptoms:
We take a root-cause functional medicine approach to immune health & gut microbiome, using advanced gut microbiome testing and personalised nutritional therapy protocols.
We test for gut permeability, inflammation markers, and immune function indicators.
We focus on healing the gut lining to restore proper immune function and reduce inflammation.
We create a plan that strengthens your immune system from the inside out through gut health.
"I was getting sick every few weeks and my autoimmune markers were climbing. Elena's gut-focused approach has transformed my immune health. I haven't had a cold in months."
— Michael R.
Around 70% of your immune system resides in your gut. The gut lining acts as a barrier, and the gut microbiome trains immune cells to distinguish between harmful pathogens and harmless substances. When gut health is compromised, immune function suffers — leading to frequent infections, allergies, or autoimmune reactions.
Research increasingly links intestinal permeability (leaky gut) to autoimmune conditions. When the gut barrier is compromised, undigested food particles and bacterial toxins enter the bloodstream, triggering immune responses that can lead to the immune system attacking the body's own tissues.
A gut health practitioner tests for gut permeability, microbiome imbalances, and nutrient deficiencies (vitamin D, zinc, vitamin C) that weaken immunity. By repairing the gut lining, rebalancing bacteria, and correcting deficiencies, immune resilience can be significantly strengthened.
Evidence-based articles to help you understand and improve your health
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