March 21, 2025

The Memory Vitamin: How B12 Can Keep Your Mind Sharp

10 minutes

Story at-a-glance

Low vitamin B12 levels slow brain signals and thinking speed in seniors, affecting memory and focus
Research shows vitamin B12 treatment improved symptoms in 84% of patients with memory issues, with 78% scoring higher on cognitive tests after three months
High methylmalonate and homocysteine levels — B12 deficiency markers — are linked to smaller brain size and cognitive decline, even when B12 blood levels appear normal
Regular vitamin B12 testing is important, especially after age 50, as your body absorbs less B12 with age and early intervention prevents damage to brain function
Good B12 sources include grass fed meat and dairy; vegetarians and those taking medications like metformin should consider supplements to maintain B12 levels

...more

By Dr. Mercola

4.6

14671,467 ratings

March 21, 2025

10 minutes

Story at-a-glance

Low vitamin B12 levels slow brain signals and thinking speed in seniors, affecting memory and focus
Research shows vitamin B12 treatment improved symptoms in 84% of patients with memory issues, with 78% scoring higher on cognitive tests after three months
High methylmalonate and homocysteine levels — B12 deficiency markers — are linked to smaller brain size and cognitive decline, even when B12 blood levels appear normal
Regular vitamin B12 testing is important, especially after age 50, as your body absorbs less B12 with age and early intervention prevents damage to brain function
Good B12 sources include grass fed meat and dairy; vegetarians and those taking medications like metformin should consider supplements to maintain B12 levels

...more