All resources I've ever read argue that coffee is super helpful. Probably, I'm a sort of outliner. I drink no more than 1 cup of coffee per day and in 5 years this habit has gifted me with painful heartburns and chronic gastritis.
Initially, I started consuming coffee only because my mom has Parkinson's disease and coffee is supposed to have preventive properties. I'm afraid I will end up with ulcer sooner than I will live to Parkinson's onset.