Studies show blood pressure and vitamin C impact dementia risk among frail seniors

A study of 6,135 adults with an average age of 75, followed for a median of nine years, examined the relationship between blood pressure and dementia in people with physical frailty. Among participants classified as frail or pre‑frail, elevated blood pressure was linked to a 32 % lower odds of developing dementia compared with normal pressure, while robust individuals with high blood pressure faced a 39 % higher risk. The authors suggest that optimal blood‑pressure targets may need to consider a patient's frailty status.

Research involving 2,044 Japanese adults aged 64 and older found that low blood‑level vitamin C was associated with reduced gray‑matter volume, weaker neuronal network connectivity and poorer memory performance. Although the link is statistical rather than causal, the investigators noted that a diet rich in vitamin C—such as fruits and vegetables—could help support brain health in older age.