TRVTH. For the chronically sleep-deprived, cutting back may be enough to show serious effects. I cut down to two caffeinated drinks a day during the summer (u

TRVTH. For the chronically sleep-deprived, cutting back may be enough to show serious effects. I cut down to two caffeinated drinks a day during the summer (usually tea or coffee in the morning and a soda in the afternoon). I was dragging around for the first week or two, but doing physical work (home renovation!) helped with that. I definitely needed the respite from the high-caffeine hijinx that characterise the academic year for me.