What surprises me is how many people drink coffee first thing in the morning. The organism is literally in wake-up mode, with cortisol spiking ~30min after wake

What surprises me is how many people drink coffee first thing in the morning. The organism is literally in wake-up mode, with cortisol spiking ~30min after wake up. So you get a caffeine AND a spike in cortisol at the same time. Better to wait at least couple of hours after waking up.