Some people are caffeine hyper-metabolizers. You may be one. And no, the "standard" coffee dose is a single "double"/"cafe" cup (ie, 12oz or ~350ml total) of d

Some people are caffeine hyper-metabolizers. You may be one. And no, the "standard" coffee dose is a single "double"/"cafe" cup (ie, 12oz or ~350ml total) of drip or immersion or pour-over (extraction methods vary caffeine extraction, see recent James Hoffman video on an example of how much). Drink this cup somewhere between an hour after waking up and 8 hours before going to bed. Anything more does not increase the focusing effect of caffeine much, but does greatly increase the side effects in some individuals. Anything more than that can drive up tolerance. 3-5 cups a day (measured in single 6oz/~125ml cups) would be too high of a dose (even if taken along that prescribed timing window, not in one go), and would also be driving up tolerance; however, this approximates the standard western use of it, ie, is "normal/average".