Trending Now - Study Reveals Normal Vitamin B12 Levels Could Harm Brain Health

WHO:

Inc - Researchers at UC San Francisco conducted the study on vitamin B12 levels and brain health.

WHAT:

Inc - The study revealed that standard vitamin B12 ranges may be too low for older adults, potentially leading to cognitive issues and brain lesions.

Science Daily - Older adults with “normal” but lower levels of active B12 exhibited signs of slower thinking, delayed visual processing, and increased damage to the brain’s white matter.

WHERE:

Science Daily - The research was conducted at UC San Francisco.

WHY:

Science Daily - Current health guidelines for vitamin B12 may not be sufficient to protect the aging brain.

HOW:

Science Daily - The study assessed cognitive functions and brain health indicators in older adults with varying levels of vitamin B12.

(UPDATED May 22, 2026 19:30 UTC)

Researchers at UC San Francisco have found that the standard vitamin B12 levels considered normal may actually be too low for older adults, which could lead to cognitive issues and brain lesions. The study revealed that older adults with lower levels of active B12 showed signs of slower thinking, delayed visual processing, and increased damage to the brain's white matter. This research suggests that current health guidelines for vitamin B12 might not be adequate to protect the aging brain, highlighting the need for a reassessment of these standards.