§ The Investigation Series
The Investigation Series

Eight conditions. One upstream question.

The H. Pylori Investigation Series is eight evidence-based condition guides — one for each clinical presentation the literature has associated with H. pylori beyond the digestive tract. Each guide maps the mechanism, the standard workup's blind spot, the labs to request, and the questions to bring to a physician. Every claim is graded.

8 Investigation guides
3 Evidence tiers
120+ Peer-reviewed citations
$29 each PDF · instant download
welyon.com / guides
A diagnostic investigation series
Nutritional
Guide № 01 · Chronic Fatigue

The fatigue nobody can name

Unexplained, post-exertional, "all-labs-normal" fatigue — and the gastric pathway worth ruling out.

Moderate evidence Get the Guide
Metabolic & Cognitive
Guide № 02 · Brain Fog

The brain fog investigation

Cognitive symptoms with no structural finding — vitamin pathways, inflammation, and the gut–brain axis.

Moderate evidence Get the Guide
Nutritional
Guide № 03 · Iron Deficiency

Why your iron won't budge

Refractory iron deficiency in adults who absorb fine on paper — what the standard workup overlooks.

Strong evidence Get the Guide
Autoimmune
Guide № 04 · Thyroid

The thyroid–stomach connection

Hashimoto's autoimmunity and the molecular-mimicry hypothesis — the evidence base, plainly graded.

Moderate evidence Get the Guide
Metabolic & Cognitive
Guide № 05 · Metabolic

The metabolic question

Insulin signalling, inflammation, and the case for a gastric workup before the next medication trial.

Exploratory Get the Guide
Nutritional
Guide № 06 · Nerve & Energy

The Nerve & Energy Connection

Unexplained nerve symptoms, fatigue, or B12 deficiency — and the gastric pathway worth ruling out.

Moderate evidence Get the Guide
Skin
Guide № 07 · Chronic Hives

When the hives won't stop

Chronic spontaneous urticaria and the mast cell axis — what an allergist might not order.

Moderate evidence Get the Guide
Autoimmune
Guide № 08 · Immune

Your Immune System Is Confused

H. pylori, molecular mimicry, and the upstream infection driving multiple autoimmune conditions.

Strong / Moderate evidence Get the Guide
Not sure which one is yours?

Start with the free Overview — eighteen pages, no paywall.

The free H. Pylori Overview introduces the diagnostic gap, the four systemic mechanisms, and which of the eight guides is the right next step for your specific symptom. Single email delivery, no subscription.

Send me the overview