V ITAMIN C SUPPORTS BRAIN HEALTH A major new study out of Japan is shaking up what we know about diet and the aging brain. Researchers have discovered that higher blood vitamin C levels are associated with healthier brain structure and stronger network connections in older adults—a finding that could change how we think about nutrition and cognitive aging (Nagaya et al., 2026). The study, published in PLOS One in June 2026, followed more than 2,000 adults aged 64 and older. Those with lower blood vitamin C had less gray matter and weaker connections within the brain’s default mode network, a system crucial for memory, attention, and other core cognitive skills. While these results don’t prove that vitamin C directly protects the brain, they add to a growing body of evidence that nutrition could play a key role in maintaining mental sharpness later in life (Nagaya et al., 2026). The research team, led by Haruka Nagaya at Hirosaki University, used MRI scans and blood samples to prob...