Low vitamin C levels linked to reduced brain volume in new study

A new study suggests that vitamin C levels may be linked to brain health in older adults, with researchers observing differences in brain structure among people with lower levels of the nutrient.

The study analyzed more than 2,000 adults aged over 64, comparing blood plasma vitamin C levels with MRI brain scans.

Researchers found that participants with reduced vitamin C levels tended to have lower gray matter volume in the brain.

Gray matter plays an important role in processing information and is closely linked to functions such as memory, attention, and decision-making.

The study also identified weaker connectivity in the brain’s “default mode network,” a system involved in autobiographical memory, focus, and internal thought processes.

Even after adjusting for key factors such as age, education, and physical activity, the association between vitamin C levels and brain structure remained.

Study co-author Tomohiro Shintaku said the findings raise the possibility that diet could play a role in supporting brain health in later life.

“This finding generates the exciting hypothesis that a diet rich in vitamin C might play a supportive role in maintaining brain health and mitigating age-related cognitive decline in older adults,” he said.

Researchers emphasized, however, that the study does not prove a direct cause-and-effect relationship between vitamin C intake and brain health.

They also noted that further research is needed to confirm the findings and better understand the potential connection.

While the results are still preliminary, the study adds to growing interest in how nutrition may influence brain aging and long-term cognitive function.