I am 53 years old.
I really didn't start drinking a lot of coffee on a regular basis until I was in my early 30's. At that time I had a job where we always have a pot of coffee brewed - so I drank it all day long.
Into my 40's my wife started buying the high powered stuff and we sometimes even ground our own beans. Around 10 years ago that high powered brew started making me nervous and anxious so I quit coffee.
I eventually got back into it and up until 39 days ago, when I quit drinking alcohol, I was consuming two 20 ounce cups of the high powered coffee every morning. I have had panic attacks and anxiety for months and since I quit the booze I have pretty much quit the coffee too. I drink a few sips just to try and stop the headaches and shake the groggy feelings but I plan to give it up entirely due to my anxiety issues.