The limits are published alongside the reasoning.
- Evidence tiers
Every article carries an explicit evidence tier, so established biology is never presented as if it were clinical proof.
Read the claim ledger - What this does not prove
Mechanistic pieces are required to state their own limits and the competing explanations that would fit the same data.
See the counterarguments - Published corrections
Where the reasoning has been revised, the revision is recorded rather than quietly edited away.
Review the standards
Pick the sentence that sounds like your situation.
- Why does my SIBO keep coming back?
- Are SIBO breath tests actually reliable?
- Why don't antihistamines settle my symptoms?
- Can I have mast cell activation with normal tryptase?
- Why won't my Long COVID symptoms resolve?
- Why did COVID trigger this in me and not others?
- Why are my labs normal when I feel terrible?
- Why doesn't my stool test match my symptoms?
- Why does every protocol stop working after two weeks?
- Why did butyrate or probiotics make me worse?
- What do bile acids have to do with my gut symptoms?
- Can gut health affect my hormones and egg quality?
Educational mechanistic writing. It does not diagnose, and it does not replace the clinician treating you.
Seven mechanistic threads run through this library.
Recurrent SIBO & breath-test interpretation
14 articles · recurrent SIBO
Mast-cell activation, tryptase & histamine
19 articles · mast cell activation
Long COVID, post-viral gut–immune & POTS
13 articles · Long COVID gut symptoms
Colonocyte bioenergetics, butyrate & oxygen
19 articles · colonocyte bioenergetics
Bile acids, TUDCA & C. difficile ecology
5 articles · bile acid dysfunction
Gut–hormone axis, fertility & estrobolome
3 articles · gut microbiome and fertility
Lab-pattern interpretation
6 articles · lab pattern interpretation
17 articles · showing 12
- MCAS & Mast Cells· August 27, 2026· 18 min· Mechanistic inference
The Antihistamine–Stomach Acid Connection: Why Low Acid Is Often a Signaling Problem, Not Just a Digestion Problem
Long-term acid suppression and H2 antihistamines act on the same histamine signal that parietal cells use to secrete acid. A mechanistic look at why persistent reflux, early fullness, poor protein tolerance, iron and B12 abnormalities and recurrent dysbiosis can follow — and why low stomach acid is often a signalling problem rather than a digestion problem.
#histamine#h2-receptor#stomach-acid - MCAS & Mast Cells· August 11, 2026· 13 min· Mechanistic inference
Why a Normal Tryptase Can Miss Mast Cell Activation: A More Precise Testing Framework
A normal baseline tryptase answers a narrower question than most people assume. A more precise framework for what mast-cell mediator testing can and cannot rule out, including timing, handling and mediator selection.
#tryptase#mcas#mast-cell-activation - MCAS & Mast Cells· August 6, 2026· 4 min· Mechanistic inference
Your Mast Cells May Be Reacting to a Gut That Never Stopped Signaling Danger
Mast cells rarely become reactive without an input. A short reading of the gut-derived signalling that keeps them primed, and why that reframes mast-cell symptoms as downstream rather than primary.
#mast-cells#mcas#dysbiosis - Frameworks· July 30, 2026· 11 min· HCM interpretation
SIBO, MCAS, POTS and Food Intolerance May Be One Self-Sustaining System
For years, SIBO, MCAS, POTS, dysautonomia, food intolerance, chronic fatigue, neurological symptoms, and mitochondrial dysfunction have been treated as separate diagnoses.
#sibo#mcas#pots - MCAS & Mast Cells· June 9, 2026· 13 min· Mechanistic inference
Why Mast Cell Activation May Be the Last Domino, Not the First — A Systems-Biology Reframe of MCAS
For decades, the mast cell has carried a reputation it may not fully deserve. We learned it as the cell of allergy: the histamine grenade, the hive, the wheeze, the anaphylactic emergency. In that framing, Mast Cell Activation Syndrome (MCAS) becomes a straightforward story —…
#mcas#mast-cells#systems-biology - MCAS & Mast Cells· May 22, 2026· 3 min· Mechanistic inference
Estrogen, Mast Cells, and Why Your Gut Symptoms Change Across Your Cycle
If you have a chronic gut condition — IBD, IBS, SIBO, MCAS, histamine intolerance, or some overlap of them — you have probably noticed something important: your symptoms are often not random.
#estrogen#mast-cells#histamine - Host Capacity Model· May 21, 2026· 23 min· Mechanistic inference
Why Probiotics Make You Sicker, Not Better: The Six Mechanisms Driving Probiotic Failure in MCAS, SIBO, Histamine Intolerance, and Long COVID, and Why The Field Has Been Asking The Wrong Question
What the research actually shows about why patients with chronic gut dysfunction react badly to the most widely recommended supplement in functional medicine, and where the actual lesion lives.
#probiotics#histamine#d-lactate - Host Capacity Model· May 14, 2026· 32 min· Mechanistic inference
Why Your Chronic Illness Got Dramatically Worse in Perimenopause: The Hormonal Cascade Driving Gut, Mast Cell, Brain Fog, and Fatigue Symptoms in Your 40s
What the research now shows about why women in their 40s experience the emergence or sudden worsening of MCAS, histamine intolerance, SIBO, autoimmune flares, and post viral illness, and where the actual upstream lesion lives.
#perimenopause#mcas#histamine - MCAS & Mast Cells· May 14, 2026· 26 min· Mechanistic inference
Histamine Intolerance: Why the DAO Enzyme Story Is Incomplete, and the Real Reason Your Low Histamine Diet Stopped Working
What standard explanations miss about bacterial histamine, the second breakdown enzyme almost nobody discusses, and why mast cell driven reactivity sits on a layer none of these interventions reach.
#histamine#mcas#dao - MCAS & Mast Cells· April 22, 2026· 10 min· Mechanistic inference
10 CRITICAL POINTS ABOUT MATERNAL MITOCHONDRIAL DYSFUNCTION AND YOUR MCAS
What I've Been Exploring And What You Need to Know
#mcas#mitochondri#histamine - Mitochondria· April 20, 2026· 10 min· HCM interpretation
Why Butyrate Supplementation Makes Chronic Gut Dysfunction Worse: The Data They Don't Show You
ou ve probably heard it.
#mitochondri#butyrate#colonocyte - MCAS & Mast Cells· April 17, 2026· 3 min· Exploratory
Why Are People With Mast Cell Activation Feeling Better on Nicotine Patches?
I ve been getting flooded with messages about this.
#mcas#histamine
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