Brain fog, explained without the hype
What actually causes it, what the evidence supports, and what is being sold to you. Written from experience and research, never pretending to be medical advice.
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Latest articles
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Celiac Disease and Brain Fog: Test Before You Cut Gluten
Patient surveys link celiac disease and brain fog, but cutting gluten before testing makes the result unreliable. What the guidelines require, compared.
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Can Dehydration Cause Brain Fog? What It Actually Takes
The 1 to 2 percent figure everyone quotes, traced back to the two trials it came from, with what those trials measured, what did not change,…
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My Head Feels Heavy and Foggy: Red Flags and Real Causes
A heavy, pressured head with fog on top is usually tension, sinuses, short sleep or painkillers. A published red flag list names the features that change…
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Can Too Much Caffeine Cause Brain Fog? The Withdrawal Clock
Too much caffeine can fog you by stealing sleep, but so can less than usual. The withdrawal clock from the research, the unsettled debate, and what…
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Can Brain Fog Be Caused by Anxiety? What Studies Measured
Anxiety is linked to lower working memory scores, a small to moderate effect across 22,061 people. What the number means, why fog feels worse than tests…
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Brain Fog and Blurred Vision: The Signs That Need a Doctor
Brain fog and blurred vision often travel together for ordinary reasons. Here is what NHS and eye institute guidance links to the pair, and the sudden…
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Brain Fog After Flu: The Evidence and What People Report
Brain fog after flu is common and barely researched. What the primary sources actually show, what people who have had it report, and when to see…
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Green Tea Brain Fog: The Dose Problem Nobody Mentions
The caffeine and theanine trials everyone cites used 97 mg and 200 mg of theanine. A measured cup of green tea holds about 17 mg, and…
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Low Iron Brain Fog: What the Evidence Actually Shows
The evidence linking low iron to brain fog is thinner than the headlines suggest, and a ferritin test settles more than any article can.
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Mentally Tired Meaning: Not Sleepy, and Not Just Tired
Sleepiness, physical fatigue and mental fatigue are three different states that English collapses into one word. Here is what separates them, what the evidence shows, and…
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Memory Loss During Menopause: What Comes Back, and When
The dip is real, narrow and concentrated in perimenopause. Three cohorts set side by side on what actually recovers afterwards, and what the popular pages leave…
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Emotionally Exhausted Symptoms and the Brain Fog With It
What emotional exhaustion is reported to feel like, the cognitive deficits measured in burnout research, where the classification disagrees with the popular articles, and what people…