I drink 3-4 coffees a day, sometimes tea (earl grey) as well. I was thinking, is this elevating my resting heart rate? Am m I going to die earlier because of my coffee habit? I don’t think so. I checked in with o3. The short answer: At the level you describe — about 3–4 single espressos a day (≈ 180-320 mg caffeine) — there is no solid evidence that your resting heart rate will stay chronically elevated or that you will damage your heart over time, provided you are otherwise healthy...
