Category: What causes it

What the guidelines, the reviews and a trial now running actually say about UTI brain fog and confusion, including where the sources openly disagree.

Fog often arrives before the calendar changes, a single FSH result is a snapshot of a moving number, and NICE’s own symptom list leaves brain fog…

Patient surveys link celiac disease and brain fog, but cutting gluten before testing makes the result unreliable. What the guidelines require, compared.

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,…

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…

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…

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…

The evidence linking low iron to brain fog is thinner than the headlines suggest, and a ferritin test settles more than any article can.

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…

New parents describe the fog consistently, yet one study found no measurable deficit a year after birth. Here is what the evidence supports, what it does…

Pooled estimates put brain fog at around 30 percent of people with long COVID, and the largest study found small average cognitive deficits. Here is what…

Brain fog is one of the commonest perimenopause symptoms and among the least talked about. Here is why.