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Journal ArticlePloS one·Jun 2026

Higher Vitamin C in the Blood Is Linked to Healthier Brain Structure

Key Insight

This study links higher blood vitamin C to healthier brain structure, but it can't prove cause.


In older adults, people with more vitamin C in their blood tended to have more gray matter and better connections in a key brain network. This held up even after accounting for age, education, and conditions like diabetes. It's a snapshot in time, so it can't prove vitamin C protects the brain.

Conflict of Interest Disclosure: Two authors work for and hold stock in KAGOME, a health-promotion company that funded a department at the university.

Disclaimer: Research summaries are provided for informational purposes only and do not constitute medical advice. Always consult a qualified healthcare professional before making changes to your health routine.