Scientists tracked coffee drinkers for dementia risk over 43 years. Here’s what they found

There’s long been debate as to whether coffee is good for you. But this new study suggests that caffeinated coffee, as well as caffeinated tea, could lead to lower incidence of dementia. So if your morning routine involves making a bleary-eyed beeline to the coffee maker immediately upon waking—you may be doing something right. The study comes from researchers at Mass General Brigham and the Broad Institute of Harvard University and MIT, and was recently published in the Journal of the American Medical Association. The teams studied 131,821 individuals from two cohorts: one group of men and one group of women in the U.S., all of whom did not have diseases like dementia, cancer, or Parkinson’s at the start of the study. The researchers followed up with the participants to track their coffee and tea drinking habits every two to four years, with some follow-ups even after 43 years, from the early 1980s to 2023. What the researchers discovered was that moderate amounts of caffeinated coffe