Normal Vitamin B12 Levels May Still Be Too Low for Brain Health, Study Finds

A UCSF study finds lower but still ‘normal’ B12 levels linked to slower cognitive processing and brain damage in older adults.

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Older adults with vitamin B12 levels currently considered normal may still face cognitive decline and brain damage, according to a new study.

Participants with lower—yet technically acceptable—B12 levels showed measurable brain white matter damage and slower cognitive processing, prompting researchers to call for a reevaluation of what constitutes “healthy” B12 levels in aging populations.