Persistent fatigue, palpitations, breathlessness, reflux, bloating, and brain fog are often treated as separate problems. They rarely are. Most reflect one disrupted axis: gut, immune system, and vagus nerve, communicating in a self-perpetuating cycle.
Recent post-mortem studies in patients following SARS-CoV-2 infection have identified inflammatory infiltrates involving vagal pathways and brainstem nuclei — providing the first histological support for what has long been observed clinically.
After infection, beneficial gut species decline and toxin-producing bacteria expand. Bacterial endotoxin (LPS), hydrogen sulphide, and secondary bile acids accumulate. The gut lining loosens, allowing inflammatory products to translocate.
Translocated toxins activate macrophages and MAIT cells. Persistent immune activation does not resolve in a normal timeframe when the inflammatory drivers continue. The system stays in a heightened state.
Macrophage-driven inflammation in tissues surrounding the vagus nerve, the nodose ganglion, and brainstem nuclei disrupts both directions of signalling. Recovery, breathing, digestion, and heart rhythm are all affected at once.
“You cannot reseed a toxic garden before clearing the weeds. Sequence matters more than intensity.”
Many people receive normal investigations across cardiology, gastroenterology, ENT, and neurology — yet their symptoms continue. The pattern below is what brings them all into focus.
Palpitations, racing heart, light-headedness on standing.
Shallow breathing, frequent sighing, breathlessness without exertion.
Reflux, bloating, slow emptying, early fullness, nausea.
Tightness, lump sensation, persistent cough, hoarseness.
Post-exertional crashes, unrefreshing sleep, slow recovery from stress.
A 90-second clinical assessment that identifies whether your symptom pattern is consistent with autonomic imbalance — and whether your gut may be a contributing driver. The result is a phase outcome that points to the right next step.
Complete all 7 questions to receive your phase outcome and the clinical guide.
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The combined picture — your vagal pattern alongside your gut readiness phase — tells you whether digestive inflammation is driving your autonomic symptoms, and which of the three recovery pathways below is right for you.
All three courses are built around the ROOT framework. The right starting point depends on your assessment outcome — not on intensity, urgency, or which course costs more.
The right starting point if your gut and autonomic systems are mostly stable, but you want to understand probiotic timing, prevent progression, and protect against re-exposure.
The full sequence from clearing through long-term maintenance. The right pathway when both gut and autonomic systems show significant disruption — the most appropriate course where the gut-vagus pattern is established.
Combined gut repair and immune support for those with mild-to-moderate symptoms and emerging autonomic involvement. Covers the clearing and repair phases in depth before structured reseeding.
Vejon Health is the clinical education programme of Dr Philip McMillan — a physician and researcher whose work focuses on gut health recovery, immune dysregulation, and post-viral sequelae.
The ROOT framework was developed in response to a clinical pattern that has become increasingly common since 2020: persistent post-viral and post-inflammatory symptoms that don't respond to standard, symptom-by-symptom treatment. The framework organises recovery into four phases, sequenced in the order the body actually requires.
All content here is educational. It is grounded in published research, post-mortem case studies, and clinical observation, and is delivered in plain language for people navigating their own recovery — not in place of medical advice, but to make the mechanism understandable so that the path forward becomes clearer.
Ninety seconds of focused clinical questions. A clear phase outcome. A 10-page guide explaining the mechanism behind your symptoms. From there, the right course is straightforward to identify.