I once did an experiment and went completely caffeine free. First three days I was sleepy, then I recovered to exactly the same productivity level. Then I dec

I once did an experiment and went completely caffeine free. First three days I was sleepy, then I recovered to exactly the same productivity level. Then I decided to make me more productive and drunk a 0.25 Adrenaline Rush. My symptoms were nothing less than caffeine overdose. I wanted to work but was unable to do anything because of total lack of focus. So I wanted to sleep and unable to sleep because fo hyperalertness. Then I wanted to work because I cannot sleep, etc. The cycle lasted for six hours at least and it was very unpleasant. I was even unable to read! Right now I take a long walk after work if I want to be really productive next day.