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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Binaural Beats Concentration Claims: What the Studies Show
What the binaural beats meta-analyses found for attention and memory, the single studies that contradict them, what focus tracks promise, and what about 40 listeners reported.
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Magnesium for Brain Fog: What the Trials Actually Tested
Every human trial of magnesium and thinking this page could verify, with who took part, how long it ran, what changed, what did not, and who…
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Morning Brain Fog: How Long Waking Grogginess Really Lasts
How long sleep inertia lasted in three sources, why waking after eight hours can test worse than a night awake, what made it heavier in the…
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MS Brain Fog: What Cog Fog Is and What 116 Posts Report
Which thinking skills MS affects most according to four cited sources, the 2025 UK MS Register study that found a cognition first subtype, what the NICE…
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Allergies and Brain Fog: Is It the Pollen or the Pills?
What five studies of allergic rhinitis and thinking actually measured, what the antihistamine leaflets say about drowsiness with the date checked, and what 71 allergy forum…
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Lupus Brain Fog: What Studies Found and What Patients Report
Six published estimates of lupus brain fog side by side with the definition each used, what a hospital leaflet lists as contributors and red flags, and…
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Foods That Help With Brain Fog: What the Diet Trials Showed
What the studies behind the brain fog food lists measured, the 2023 MIND diet trial they leave out, what people with long covid say about cooking,…
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Brain Fog After Eating: What the Meal Studies Actually Show
What the sleep lab, glucose monitor and guideline studies measured about brain fog after eating, how reactive hypoglycaemia is actually confirmed, and the signs that need…
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Thyroid Brain Fog: What 5,170 Patients Said It Feels Like
What the largest survey of thyroid brain fog counted, what NICE says about testing by recommendation number, why fog can outlast a normal result, and what…
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Depression Foggy Head: Why It Can Outlast the Low Mood
How often depression brings a foggy head, why it can outlast the low mood, why it so rarely comes up in appointments, and what people interviewed…
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Cognitive Fatigue: What the Brain Studies Actually Found
The cognitive fatigue research in plain language: the Paris glutamate study and the effort choice paper by design, the critics, and what it means outside the…
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Anxiety Fatigue: Why Worry Drains You, From the Studies
Why anxiety leaves people exhausted: the sleep and anxiety loop in five cited findings, why the cortisol story is messier than claimed, and what the trials…