My father in law drinks coffee everyday and never gets sick eats like a horse. But he has gout and joint pain+inflammation,high blood pressure. Coffee has its advantages and disadvantages. Coffee is a diurectic/ contains caffeine which can cause mineral loss=cause issues with blood pressure. But I know a lot of coffee drinkers that seem to never get sick. Must be all the bile/acids that the coffee promotes that makes a bad environment for microbes. Coffee definetly pisses off candida . Ive experienced that. It can also aggravate IBS.