Scientists from Harvard’s T.H. Chan School of Public Health have determined that 54% of U.S. adults drink coffee on a daily basis. Also discovered that coffee appears to protect the brain against cognitive impairments and boosts thinking (reasoning) skills. One specific class of compounds in roasted coffee seems to provide the benefit - phenylindanes - that inhibits the growth of the toxic proteins tau and beta-amyloid. Longer roasting times produce more phenylindanes. Dark roasted coffee has the strongest protective effect on the brain.
The full study was published in Frontiers of Neuroscience by Dr. Donald Weaver (Krembil Brain Institute, Toronto, Canada).
Special thanks to Maria Cohul for this information. (November 6, 2018)