Harvard researchers found that people who drink 3 to 5 cups of coffee (caffeinated or decaf) a day may have a lower risk of developing neurological diseases and type 2 diabetes. Coffee lovers can thank chlorogenic acid, a compound in coffee that acts as an anti-inflammatory and decreases cells' insulin resistance. Caffeine also blocks adenosine, a chemical that inhibits the activity of nerve cells; several studies correlate caffeine intake with higher scores on memory tests.
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