
B-12 and the Brain: Why This Deficient Nutrient Is Key to Memory and Mood
Vitamin B-12 is crucial for brain health, helping build myelin, support DNA synthesis, and produce neurotransmitters; when levels drop, memory, focus and mood can suffer, with older adults and vegetarians at higher risk. Deficiency is common and can cause fatigue, numbness, balance issues, and cognitive decline. It’s diagnosed by blood tests (B-12, plus homocysteine and methylmalonic acid as needed). Good dietary sources include animal products and fortified foods; supplementation is typically oral, with injections for more severe cases. Early treatment can reverse memory problems and brain fog, while prolonged deficiency can lead to irreversible issues.



