Vitamin B12 deficiency: How it starts in the brain; risks and symptoms

Vitamin B12 deficiency often begins in the brain, causing subtle changes in thinking and mood. These early signs can include forgetfulness and difficulty concentrating. The deficiency impacts brain cell communication and neurotransmitter production. Certain groups like vegetarians, vegans, and older adults are at higher risk. Early detection through blood tests is crucial for treatment and preventing long-term neurological issues.

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