Tag

Vitamin C

verdict

Vitamin C: uses, evidence, dosing and safety

Vitamin C has been tested against the common cold for sixty years and the answer is still a shrug: it may shorten one slightly, and taking it once a cold has started does almost nothing.

Aug 6, 2026

News

Blood vitamin C linked to more gray matter in older adults

In 2,044 older adults in Japan, those with lower vitamin C in their blood tended to have less gray matter and weaker connections in a key brain network. It is a snapshot, so it cannot show that vitamin C protects the brain.

Jul 17, 2026