Does coffee offer health benefits?
Answer From Donald Hensrud, M.D.
Feb 26, 2020
While past studies hinted that coffee might have a dark side, newer research suggests that it may actually have health benefits.
Why the reversal? It's hard to look at just one aspect of diet and connect it to a health condition because so many other factors that could play a role. For example, early research on coffee didn't always take into account that heavy coffee drinkers also tended to use tobacco and be sedentary.
When newer studies adjusted for such factors, they found a possible association between coffee and decreased mortality.
https://www.mayoclinic.org/healthy-lifestyle/nutrition-and-healthy-eating/expert-answers/coffee-and-health/faq-20058339 