Article library
Brain fog articles
These guides sit between the analyzer and the cause library. Use them when you want a clearer explanation of what a pattern feels like, what it may overlap with, what to measure next, and where to read deeper without jumping straight to certainty.
The fastest way to use this library is to start with the section that matches your question: what it feels like, what mechanism may fit, what biomarker to measure, what low-risk pattern test to try, or which condition is worth reading more carefully.
Symptom Experience
Start here when the main problem is putting the feeling into words before you start comparing labels.
Mechanisms
These guides explain the underlying processes that can make several symptoms rise and fall together.
Mechanism guide
Gut and Brain Fog
How gut symptoms, meal-linked crashes, and inflammation patterns can overlap with cognition problems.
Mechanism guide
Stress, Cortisol, and Brain Fog
How stress load, sleep disruption, and timing patterns interact when the fog feels wired, drained, or crash-prone.
Mechanism guide
Histamine and Brain Fog
Why food reactivity, flushing, itching, headaches, and post-meal fog can cluster together.
Mechanism guide
Blood Sugar and Brain Fog
How post-meal crashes, shakiness, irritability, and rebound fog point toward fuel instability.
Mechanism guide
Sedentary Patterns and Brain Fog
How deconditioning, low movement, and poor circulation can look like purely cognitive decline.
Mechanism guide
Neuroinflammation and Brain Fog
A grounded explainer for fog that feels inflamed, pressured, flu-like, or post-viral.
Mechanism guide
Long COVID Clusters and Brain Fog
How post-viral, autonomic, inflammatory, and exertional patterns can overlap instead of pointing to one neat label.
Biomarkers & Measurements
Use these when you want to understand what a test or measurement can help evaluate, and what it still can't prove on its own.
Biomarker guide
Thyroid and Brain Fog
A deeper look at thyroid-linked slowing, cold intolerance, hair thinning, and overlapping iron issues.
Biomarker guide
Nutrients and Brain Fog
A practical overview of iron, B12, vitamin D, and the kinds of deficiency patterns that are easy to miss.
Biomarker guide
I Stand on One Foot Every Morning. A Study of 1,702 People Explains Why.
A 10-second balance test predicted mortality better than most bloodwork. Here's why it tests your brain, not your legs - and what it has to do with brain fog.
Biomarker guide
Can EEG Explain Brain Fog?
When EEG is useful, what it actually measures, and why most fog patterns need broader biomarker context.
Experiments
These reads are about low-risk pattern tests: small, trackable changes that can strengthen or weaken a theory.
Experiment guide
Caffeine and Brain Fog
When caffeine sharpens the pattern, when it worsens it, and what timing changes actually test.
Experiment guide
Nicotine and Brain Fog
Why nicotine can temporarily sharpen attention while worsening rebound crashes, anxiety, and sleep.
Experiment guide
Keto and Brain Fog
How diet shifts can either steady fuel patterns or deepen brain fog when the match is wrong.
Cause Deep Dives
These are the more concrete condition-level reads once a pattern already feels plausible and you want a deeper cross-check.
Cause deep dive
POTS and Brain Fog
Positional fog, standing intolerance, and the clues that distinguish orthostatic patterns from other overlapping fatigue and dizziness patterns.
Cause deep dive
Menopause and Brain Fog
A practical overview of hormonal timing patterns, word-finding changes, and the overlapping patterns that can confuse the picture.
Cause deep dive
GERD and Brain Fog
Medication context, reflux-linked sleep disruption, and what distinguishes reflux patterns from nearby gut and anxiety causes.
Cause deep dive
How a Cat Scratch Caused 2 Years of Brain Fog
First-person account of discovering Bartonella as the hidden cause of unexplained rage, wired insomnia, and residual fog after optimizing every fundamental.
Cause deep dive
Allergies and Brain Fog
How congestion, sleep disruption, histamine burden, and seasonal reactivity can blur thinking.
Cause deep dive
Lyme and Brain Fog
What makes a post-infectious or tick-borne story more plausible, and what would weaken it.
Cause deep dive
Post-Concussion Symptoms and Brain Fog
A look at structural, vestibular, sensory, and overload patterns after head injury.
Cause deep dive
PPI-SIBO Connection
A 2025 meta-analysis found PPIs double SIBO risk. How acid-suppressing medications may cause bacterial overgrowth and brain fog.
Cause deep dive
SIBO vs IBS Brain Fog
Meta-analysis shows 38% SIBO prevalence in IBS. How to distinguish bacterial overgrowth from functional gut patterns.
Cause deep dive
SIBO and Histamine Intolerance
Research found dysbiosis in 66% of histamine intolerance patients. How gut bacteria produce histamine and cause brain fog.
Cause deep dive
SIBO and Blood Sugar
Diabetics have 3x higher SIBO risk. How the diabetes-SIBO cycle affects glucose control and cognition.
Cause deep dive
Vitamin D and Brain Fog
A cause-specific read that connects symptom feel, nearby lookalikes, tests to discuss, and clearer clinician questions.
Next step
Map this against your story
Use the analyzer when you want these reads tied to your own timing pattern instead of reading causes one by one.
Cause library
Explore the cause library
Use the cause pages when you already suspect a pattern and want nearby lookalikes, tests to discuss, and clinician questions.
Mental model
Understand the big picture
Start with the simplest explanation of why brain fog feels so different across people and why overlap is common.