If drinking a cup or two of coffee tends to make you feel good mentally, there’s a reason for that: A 2013 study published in the World Journal of Biological Psychiatry found drinking coffee actually acts as a mild antidepressant by boosting feel-good neurotransmitters in the brain. After examining 44,000 men and 74,000 women, they found a few cups of brew reduced the risk of suicide by 50 percent.
Other studies have tried to pinpoint exactly what in caffeine is helping to halt the onset of these diseases. A 2014 study (14) found that caffeine blocks various tau receptors (a protein that contributes to brain cell degeneration). Another study found that caffeinated coffee increased GCSF (15) - a substance greatly decreased in Alzheimer’s patients - levels in the bloodstream.