Both for me. I try not to drink that much (one 12oz mug a day usually) but it’s still enough that I _really_ feel the days I don’t. The first morning isn’t terr

Both for me. I try not to drink that much (one 12oz mug a day usually) but it’s still enough that I _really_ feel the days I don’t. The first morning isn’t terrible, but I won’t be as alert as normal (kind of a “just got out of bed” grogginess). Around lunchtime and for the next couple days I’ll be much more tired than normal, have a very difficult time focusing, and a moderate headache.