Older Adults Need to Watch Their Vitamin B12 — Here’s Why

  • تاريخ النشر: منذ 3 ساعات زمن القراءة: دقيقة قراءة

Lower active B12 in older adults was linked to slower processing and more white-matter injury.

Age Can Make B12 Harder to Absorb

Deficiency Can Affect More Than Blood

Anaemia May Never Appear First

“Normal” Total B12 May Hide a Problem

Lower Active B12 Was Linked to Slower Thinking

Brain Scans Revealed More White-Matter Damage

High Total B12 Is Not Automatically Better

Several Conditions and Medicines Raise the Risk

The Study Does Not Set a New Target

Symptoms Matter More Than Guesswork

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Vitamin B12 supports red-blood-cell production, DNA formation and the nervous system, but ageing can make adequate levels harder to maintain. Deficiency can also develop gradually, allowing neurological symptoms to emerge before the problem is recognised.

A 2025 UCSF-led study adds another concern: older adults at the lower end of the accepted “normal” range showed subtle signs of slower brain processing and greater white-matter injury. It does not prove that extra B12 prevents dementia.

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