Coffee Linked to Lower Dementia Risk

A comprehensive, multi-decade study involving over 131,000 participants suggests that regular consumption of caffeinated coffee is associated with a lower risk of dementia. Individuals who regularly drank caffeinated coffee showed an 18 percent reduced risk compared to those who consumed little or none. This benefit was observed to plateau at an optimal intake of two to three eight-ounce cups per day, or approximately 300 milligrams of caffeine.

The study, published in JAMA and funded by the National Institutes of Health, indicated that participants who regularly consumed caffeinated tea also experienced similar cognitive advantages. However, decaffeinated coffee did not show the same protective effects. These findings held even after controlling for various factors, including genetic predisposition to Alzheimer's disease, lifestyle choices, and socioeconomic status.

Researchers propose that caffeine might support brain health by reducing inflammation and improving blood sugar control, both linked to cognitive decline. Alternatively, caffeine could act as a catalyst for behaviors that promote mental activity and social engagement. While moderate coffee intake appears safe and beneficial for most adults, up to 400 milligrams daily, the additions to the coffee are critical. The benefits were primarily seen in those who drank black coffee or coffee with minimal added sugar and saturated fat, as excessive sugar and fat can increase risks for diabetes and heart disease.