Eight conditions. One upstream question.
The H. Pylori Investigation Series is eight peer-reviewed 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.
Why your iron won't budge
Refractory iron deficiency in adults who absorb fine on paper — what the standard workup overlooks.
The fatigue nobody can name
Unexplained, post-exertional, "all-labs-normal" fatigue — and the gastric pathway worth ruling out.
The brain fog investigation
Cognitive symptoms with no structural finding — vitamin pathways, inflammation, and the gut–brain axis.
The thyroid–stomach connection
Hashimoto's autoimmunity and the molecular-mimicry hypothesis — the evidence base, plainly graded.
When the hives won't stop
Chronic spontaneous urticaria and the mast cell axis — what an allergist might not order.
The metabolic question
Insulin signalling, inflammation, and the case for a gastric workup before the next medication trial.
B12 that won't hold
Low B12 in adults who are supplementing — intrinsic factor, atrophic gastritis, and the workup most miss.
The rosacea workup
Vasoactive peptides, telangiectasia, and a peer-reviewed link the dermatology workup rarely tests for.
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.