Coffee

Comparison is irrelevant. It's entirely up to your response to those stimulants, short- and long-term. For starters, the half-life of caffeine can be 3-8 hours in healthy adults, which is completely unrelated to sensitivity, which really matters, for which there is no objective test.

I used to drink up to 3 shots of espresso per day. Then I got my first amalgam filling, and coffee started causing muscle tension that I had to medicate. Over the years, my tolerance deteriorated, irritability got worse, and now more than a year after removing that amalgam, I still can't handle any amount of coffee daily. One shot makes me feel worse. Quarter shot stimulates but makes me angry, and then ruins the next night's sleep.

I don't know what's broken, but having had chronic inflammation and likely malabsorption in the small intestine because of slow (IgG) food allergies even before the amalgam is probably related. The gut is fine now, been for a year, after two decades of IBS. I can have a cup of decaf per day for a week before the muscle tension gets bothersome.

There's a book "Amalgam Illness: diagnosis and treatment" which helped a bit. Mainstream healthcare was useless against the IBS.