Check for Vitamin B12 and Iron Deficiency
for Brain Fog
Getting a blood test to check B12, folate, iron and ferritin levels — deficiencies are among the most common and easily correctable causes of brain fog.
How it works
Vitamin B12 is essential for myelin production and neurological function. Iron deficiency reduces oxygen delivery to the brain. Both cause fatigue and cognitive impairment that resolves completely when corrected.
What to watch for
Requires a blood test to confirm deficiency before supplementing. B12 deficiency is particularly common in vegans and the elderly. Iron supplementation without confirmed deficiency can cause harm.
Community experience
Other remedies for Brain Fog
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