In a large prospective cohort study including more than 130 000 US adults followed for up to 43 years, greater consumption of caffeinated coffee and tea was linked to a reduced risk of developing #dementia and modest improvement in #cognitive function. The strongest associations were observed at moderate consumption levels: about 2 to 3 cups per day of caffeinated coffee or 1 to 2 cups per day of tea. Decaffeinated coffee did not show these benefits, suggesting the protective effects may be attr