Moderate evidencevitamin
Vitamin B12 for Brain Fog
B12 is essential for myelin sheath maintenance and synthesis of S-adenosylmethionine (SAMe), a key methyl donor for neurotransmitter production. Deficiency causes demyelination and impaired neural signaling manifesting as brain fog.
How strong is the research?
Moderate evidence
Based on a clinical trial with human participants.
Research source
SourceTangney CC et al. · Neurology 2011How much to take
1000–2000 mcg
Sublingual or liquid forms bypass GI absorption issues. Essential to test B12 levels before supplementing. Methylcobalamin is preferred over cyanocobalamin.
When to take it
Best taken: morning