[whyenot]

> As most software and creative professionals know, coffee is an important technology for boosting mental acuity and maintaining peak on-the-job performance.

There is good evidence that caffeine can increase human performance, but the human body also builds up a tolerance for caffeine very quickly. I wonder how much of the boost people believe they get is from caffeine and how much of it is a placebo effect. According to Wikipedia, 300mg 3x a day for 18 days (approx. 5-8 cups of drip coffee per day) is enough for many individuals to no longer experience any effects of caffeine at all.