Cognitive symptoms, causes of brain fog, and strategies to clear it
An honest 2026 evidence review of methylene blue: what it is, how it works in mitochondria, the brain-fog and mood claims, serotonin syndrome and G6PD risks, dosing, and an honest evidence grade.
Not all brain fog supplements are created equal. Here’s an evidence-based breakdown of which ones have real research behind them, which show promise, and which are mostly marketing.
Brain fog is not a diagnosis. It is a signal. Learn the 12 most common root causes of brain fog, from neuroinflammation and gut dysfunction to thyroid problems and mold exposure.
How NAD+ therapy helps brain fog by restoring mitochondrial energy production, reducing neuroinflammation, and supporting DNA repair. Delivery methods, patient reports, and who benefits most.
At a Glance Long COVID brain fog affects an estimated 20-30% of people who had COVID-19, with symptoms persisting beyond 12 weeks. Three leading mechanisms are neuroinflammation, micro-clot formation blocking cerebral blood flow, and serotonin depletion driven by gut viral persistence. A 2022 randomized controlled trial found hyperbaric oxygen therapy (HBOT) significantly improved cognitive function…
At a Glance Estrogen directly supports brain energy metabolism, acetylcholine signaling, and BDNF production. Its decline reduces all three. Brain fog is most intense during perimenopause, not after menopause, for most women; neuroimaging confirms this is a transitional metabolic state. Most women see significant improvement within one to three years after the final menstrual period,…
At a Glance Step 1 is always finding the cause – treating brain fog without identifying the root issue is like mopping the floor while the faucet is still running. Common treatable causes include thyroid dysfunction, sleep apnea, nutrient deficiencies (B12, iron, D), gut issues, and blood sugar dysregulation. Foundational fixes – sleep, exercise, and…
At a Glance Brain fog affects 20-30% of COVID survivors, making it one of the most common Long COVID symptoms. Mechanisms include neuroinflammation, microglial activation, blood-brain barrier disruption, micro-clotting, and possible viral persistence in the CNS. Most cases resolve within 3-12 months, but a subset persists for 1-2+ years. Brain MRI is usually normal –…
Fibro fog is one of the most frustrating symptoms of fibromyalgia. Learn why cognitive dysfunction happens in fibromyalgia, what the proposed mechanisms are, and which treatments (from sleep optimization to NAD+ and neurofeedback) actually help.
Brain fog is not a diagnosis — it is a symptom of something else going on. This comprehensive guide covers the 15+ root causes of brain fog, how to test for them, evidence-based treatments, and when brain fog signals a condition your doctor might miss.