Hearing loss, tinnitus and memory
What the study measured, what it found and where it stops.
Read the analysis ↗Brain fog.Start with what
you notice.
Source-checked guides to symptoms, possible causes, tests and practical next steps.
Brain fog is an everyday name for trouble with concentration, memory, finding words and thinking speed. It describes symptoms. It is not one diagnosis.
When is your brain fog worst?
Pick the one that fits best. The rest of this page rearranges around it. You can switch at any time.
A starting point for reading, not a diagnosis. The day sketches show the shape each pattern describes, not a measurement.
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Tests
Already have a test result?
Find what a test measures, how results are read and what to ask next. This is for understanding a result you already have. It is not a list of tests everyone needs.
Open the lab interpreter ↗Something useful for today
The story behind the science
How the caffeine withdrawal evidence grew
- 2004
Putting withdrawal symptoms to the test
A review of 57 experimental and nine survey studies examined which withdrawal symptoms the evidence supports.
Read the review ↗PMID 15448977 - 2018
Why people respond differently
A later review looked at how people differ in caffeine metabolism, and what changes its effects.
Read the review ↗PMID 29514871
From Brain Fog News
All news ↗New brain fog research
Depression and thinking over time
What the research comparison found, and what is still uncertain.
Read the analysis ↗My Fog
Save what you read, so you don’t have to remember it
Keep useful causes and articles together in My Fog, and come back to them later.
Open My Fog ↗
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