Dementia and Brain Vascular Disease

Two separate U.S. studies highlighted different dementia risk signals: one found that a hidden brain condition, cerebral amyloid angiopathy, may sharply increase dementia risk in older adults (up to fourfold), while a JAMA analysis of 131,821 people from two long‑running cohorts (1986–2023) reported that higher intake of caffeinated coffee was associated with an 18% lower dementia risk. The coffee/tea analysis suggested a “sweet spot” of 2–3 cups of caffeinated coffee or 1–2 cups of caffeinated tea per day and no link for decaffeinated coffee, but experts caution the findings are observational, modest in size, and not a reason to change diet versus following proven measures like exercise, healthy eating, weight management and addressing hearing loss.