What causes brain fog and how can you clear it?

Brain fog is caused by a combination of factors including poor sleep, chronic stress, nutritional deficiencies (especially B12, vitamin D, and iron), dehydration, hormonal imbalances, inflammation, and conditions like thyroid disorders or autoimmune diseases. Certain medications, alcohol, and highly processed diets also contribute significantly. To clear it, start with the basics: prioritize 7-9 hours of quality sleep, drink enough water, and reduce refined sugar and ultra-processed foods. Regular aerobic exercise improves blood flow to the brain and reduces inflammation. Managing stress through consistent routines helps considerably. If fog persists, get bloodwork done to check for deficiencies or underlying conditions like hypothyroidism or anemia, as these require targeted treatment rather than lifestyle changes alone.