If I drink coffee I definitely notice a need to clear the bowels more often (probably twice a day). Energy drinks and caffeine tablets don't have that effect on

If I drink coffee I definitely notice a need to clear the bowels more often (probably twice a day). Energy drinks and caffeine tablets don't have that effect on me, so once a day works fine. The only negative thing is that I often work until right before I need to sleep, so if I'm drinking something mindlessly while working I end up waking up in the night once.