Coffee is not traditionally thought of as anti-carcinogenic, but it has been linked specifically to the prevention of two types of cancer – liver and colorectal cancer, which are the 3rd and 4th deadliest forms of cancer, respectively. It has also shown good results in preventing the occurrence of melanoma in people who consume it regularly. Research says that coffee drinkers have 43% lesser risk of cancer than those who do not drink it.
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.