4 cups (32oz) of java a day can cut diabetes risk by a third, possibly by improving insulin's effects.
3 cups (24oz) a day drops protects the brain, dropping the risk of Parkinson's disease by 40% and Alzheimer's disease by 20%.
2 cups (16oz) a day keeps the liver healthy, as it filters out pollutants, makes protein, warehouses extra carbs and vitamins, and helps produce bile needed to digest fat.
Many of these benefits also come from decaf. Just be sure to make coffee with a paper filter; the paper traps a compound that otherwise increases lousy LDL cholesterol.
From the July 21, 2008, Prepared Foods e-Flash