The fatigue nobody can name.
A clinical investigation guide for adults with persistent, unexplained fatigue — when the bloodwork keeps coming back 'normal', the diagnosis keeps shifting, and the four pathways most likely to be missed are the ones H. pylori sits behind.
A workup for the fatigue that won't lift.
This guide is written for the patient whose energy budget keeps shrinking but whose labs keep clearing. It maps four pathways by which an unsuspected H. pylori infection can drag systemic energetics down, and gives a sequenced plan for what to test next.
It is not a treatment protocol. It is the diagnostic conversation, written down, so the next appointment is more specific than the last.
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i.
The clinical signature of 'all-labs-normal' fatigueHow the picture differs from depression, sleep apnoea, post-viral, and pure deconditioning — and the questions that route each pathway.
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ii.
Four pathways the standard workup missesIron status, B12 absorption, chronic inflammation, HPA axis — with the evidence tier for each.
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iii.
Why 'normal' ferritin isn't the same as 'fine'Functional range vs reference range — sTfR, hepcidin, and what 'within normal limits' obscures.
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iv.
Labs to request beyond a basic panelFree T3, reverse T3, MMA, holotranscobalamin, hs-CRP — and what each adds.
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v.
Testing options for H. pyloriStool antigen, urea breath test, biopsy — trade-offs, costs, and what each rules in or out.
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vi.
What positivity changesThe clinical decisions that follow a positive result — eradication, re-testing, follow-up energy scoring, timeline.
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vii.
A conversation script for the next appointmentThree questions, phrased clinically, that route the workup toward the gastric pathway without overstating the case.
How an unsuspected infection drains the tank.
Fatigue in the presence of H. pylori rarely runs through a single pathway — it stacks. The guide treats each as testable. Below is the short version.
Pre-anaemic iron deficiency
Functional iron deficiency presents as fatigue before haemoglobin drops. H. pylori-driven hypochlorhydria and hepcidin elevation can keep ferritin functionally low while labs read 'in range'.
B12 / cobalamin uptake
Atrophic gastritis from chronic H. pylori reduces intrinsic factor secretion. B12 status drops slowly; fatigue and cognitive drag are early signals.
Inflammatory cytokine load
IL-6, TNF-α, and IFN-γ elevations from sustained gastric immune activity correlate with subjective fatigue across multiple cohorts.
HPA axis perturbation
Chronic infection alters diurnal cortisol amplitude and the morning awakening response — a quieter pathway, but documented.
Sharper questions. Better appointments.
The guide doesn't replace a clinician. It gives you the language, the labs, and the literature — so the visit is a clinical conversation, not a search.
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Recognise the clinical signature of 'all-labs-normal' fatigue and how it differs from depression, sleep apnoea, post-viral, and pure deconditioning patterns.
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Name the four pathways — iron, B12, inflammation, HPA axis — by which an unsuspected H. pylori infection can drag systemic energetics down.
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Request the right secondary labs — sTfR, holotranscobalamin, hs-CRP, free T3 — and read them in combination, not in isolation.
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Decide between testing options — stool antigen, urea breath test, biopsy — based on cost, accuracy, and your specific clinical context.
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Bring a structured conversation to your physician — three concrete questions that route the workup toward the gastric pathway without overstating the case.
Three tiers. One rubric. No exceptions.
Every claim in this guide is tagged with one of three evidence tiers. The summary below previews the four claims central to the case for investigating H. pylori in unexplained, refractory fatigue. The full reference list — twelve citations — sits at the back of the PDF.
Chronic fatigue · evidence summary
A few honest questions.
Is this medical advice?
No. It is an investigation guide — written to inform the conversation with a clinician. Diagnosis and treatment decisions belong to your physician.
Do I need to buy the testing kit?
No. The guide is content, sold separately from any Welyon product. It covers all three standard testing options — stool antigen, urea breath test, biopsy — and tells you what each costs and how to ask for it through your existing physician or insurer.
What if my labs are 'in range'?
The guide spends a section on this exact situation — what 'in range' obscures, what to look at in combination, and the secondary markers that frequently shift the picture without changing the headline numbers.
Refund policy?
14 days, no questions. If the guide isn't useful, the Lemon Squeezy receipt has a one-click refund link. We track this to keep the guides accountable.
Who wrote it?
The investigation series is authored by Welyon's editorial team and is being reviewed by the scientific advisory board currently in formation. Reviewer names will appear in the front matter of each guide upon confirmation.
Find the missing variable. Stop chasing labs.
36 pages, twelve citations, four pathways, one clear path to a sharper appointment. PDF, instant download.
FDA disclaimer · Commercial interest
These statements have not been evaluated by the Food and Drug Administration. This guide is for informational purposes only and is not intended to diagnose, treat, cure, or prevent any disease. Consult your physician before acting on any information presented here.
Commercial interest disclosure. Welyon produces an at-home H. pylori testing kit and a physician-supervised Foundation Protocol referenced in this guide. The presence of these products is disclosed throughout — including on this page, the guide cover, and in the front matter of the PDF — and does not change the content of the guide. The investigation steps described would apply equally if neither product existed.
Editorial independence. Evidence grading in this guide follows the same three-tier rubric used across the H. Pylori Investigation Series, applied identically regardless of whether the resulting investigation routes a reader toward — or away from — Welyon's products.