Caffeine Tolerance

Wiki say:

Caffeine tolerance develops very quickly, especially among heavy coffee and energy drink consumers. Complete tolerance to sleep disruption effects of caffeine develops after consuming 400 mg of caffeine 3 times a day for 7 days. Complete tolerance to subjective effects of caffeine was observed to develop after consuming 300 mg 3 times per day for 18 days, and possibly even earlier.[57] Partial tolerance to caffeine has been observed in other areas. Studies with mice indicate that after a long period of caffeine exposure, the learning benefits of caffeine observed earlier cannot be found to any significant level. Considering that 80% to 90% of American adults consume caffeine daily, and their mean daily caffeine intake exceeds 200 mg/day,[58] it can be surmised that a large fraction of the U.S. adult population is completely tolerant to most of the effects of caffeine.

Seven days? Wow.

2 thoughts on “Caffeine Tolerance

  1. Rob Caldecott

    Weird, as my caffeine tolerance seems to have plummeted with age. A cup of coffee now makes me sweat, feel anxious and weakens my bladder. :)

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