I had to go to the company doctor years ago, it was mandatory when you just started working there.
One of the questions was how much coffee I consume each day.
"1 on some days 2" I answered.
He goes off by saying that's great, 2 cups is the max you should drink each day because if you get too much caffeine in your system it builds to much pressure on your muscles or nerves, I don't remember.
After that, we looked at each other in silence for a good 10 or 15 seconds before I began stammering: "cu... cups?? No, no. I meant 1 or 2 pots a day...."
He had mini meltdown and went off on me how bad that was for my body.
Arteries* - the big main pipes for blood that gets tapped leading into all your veins in all your limbs and organs
Caffeine increases heartrate similarly to exercise but unlike exercise your arteries don't open up for caffeine. So you're increasing flow but the pipes can't handle it all, meaning the heart has to PUSH HARDER and eventually this will lead to severe fatigue and heart failure. If you have additional risk factors like a high cholesterol diet (lots of meat) or are overweight then the arteries themselves can also become clogged and fail.
I mean as a layman is sounds right but I know better than to trust internet strangers so I'm gonna be the jerk today and ask for some studies on that. Please.
I am the one singular internet stranger that you can trust completely. You do not require to read any AP Biology Textbook or look at any studies. Everything I've ever said to anybody was the 100% pure unfiltered truth, now and forever.
It's one of those things where its a very normal slow death over the course of decades, less harmful than smoking or alcohol, so it often gets brushed off as low priority. The real issue isn't even coffee, imo, but people who take 400mg caffeine energy drinks daily or even multiple times per day.