The effects of coffee on mood are beginning to reveal their secrets, and science is paying close attention. Coffee: a universal morning ritualEvery morning, billions of people unknowingly share the same gesture. Beyond that window, the positive effects faded, only to reappear slightly at the end of the day. It is also possible that morning coffee has a stronger psychological impact. That said, these side effects appeared only in a minority of individuals in the findings relayed by SciTechDaily, and did not undermine the positive link between coffee and morning mood.