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Leaky Gut (Intestinal Permeability)
Intestinal permeability is a weakened gut barrier that lets inflammatory signals into the body. We find what opened it, open drainage first, and rebuild the lining in a precise sequence.
What you may be noticing
You react to more foods each year. Bloating, irregular bowels, skin flares, joint aches, headaches, brain fog, and fatigue arrive together, and you may feel anxious after eating. You may have an autoimmune condition, seasonal allergies that worsen, or mood changes that track with digestion.
Why it is rarely one thing
The lining of your intestine is a single layer of cells, held together by tight junctions. It is designed to let nutrients in while keeping bacterial fragments, undigested food, and toxins out. When those junctions loosen, more gluten fragments, bacterial endotoxin, mold metabolites, and environmental toxins reach the immune system, which responds with inflammation. Through molecular mimicry, that response can sometimes cross-react with your own tissues.
Intestinal permeability is a real, measurable physiological phenomenon, studied extensively in celiac disease, inflammatory bowel disease, and other conditions. Its role in many chronic symptoms is a working clinical hypothesis supported by a growing body of research, and I present it that way.
Barriers rarely loosen alone. The gut lining, the blood-brain barrier, and the linings of the sinuses and lungs share similar tight junction biology, so I support them together.
Permeability is not the root. It is a consequence of something upstream, and order matters. Sealing the lining without addressing why it opened, or before drainage is flowing, rarely lasts.
Patterns we look for
- Gluten exposure, which increases zonulin release in many people and strongly in celiac disease.
- Dysbiosis, SIBO, and yeast overgrowth.
- Infections and biofilm, including parasites and H. pylori.
- Mold and mycotoxins, and other environmental toxins.
- Medications such as NSAIDs and repeated antibiotics.
- Alcohol and highly processed diets.
- Chronic stress. Stress hormones and reduced vagal tone weaken the barrier.
- Bowel regularity and bile flow, the drainage pathways that must move before repair holds.
- Low stomach acid and digestive enzyme output.
- Nutrient status, including zinc, vitamin A, vitamin D, and glutamine.
- Downstream effects: autoimmunity, skin conditions, food sensitivities, and neuroinflammation.
How I evaluate it
A comprehensive functional neurological exam assesses vagal function and autonomic balance, because the brain directly regulates gut motility and barrier integrity through the vagus nerve.
Functional testing may include comprehensive stool analysis with markers of inflammation and immune activity, zonulin or other permeability markers interpreted with appropriate caution, celiac screening and wheat reactivity panels, SIBO breath testing, food sensitivity evaluation, nutrient markers, and mycotoxin testing when exposure is possible.
How we address it
- Open drainage first: a daily bowel movement, bile flow, and lymphatic movement, with the nervous system calmed.
- Reduce and remove: a temporary elimination plan with structured reintroduction, plus overgrowths, infections, and irritating medications where your physician agrees.
- Replace digestive support such as acid, enzymes, and bile when low.
- Reinoculate with diverse plant fiber, fermented foods as tolerated, and targeted probiotic categories.
- Repair the lining with nutrient categories that support tight junctions and the mucosal layer, running alongside any antimicrobial work rather than after it.
- Rebalance and restore: strengthen vagal tone and gut motility through the brain-gut connection, reduce stress signaling, and protect sleep.
- Resonate: eat slowly and mindfully, with breath and calm, so digestion happens in a state of safety.
A sealed barrier quiets inflammation everywhere it once reached.
Book your Comprehensive Functional Medicine Eval/Neurological Exam today to discover what the contributing root causes are that are underlying your health concerns.