Put this way, the traditional idea of a “coffee break” makes a lot of sense. I almost wonder if the the idea of having coffee first thing is a habit instilled by the coffee industry to get us to all drink more coffee! What Iwata’s chart does not take into account is coffee consumption by early risers before 8 am, when many of us have our first cups. This raises the question of whether to have three coffees a day (probably too much for most people) or to forgo one of the periods Miller’s research suggests. I will follow up with him and report back on his response.