A Second Cup or More? The Caffeine Question

Coffee! It’s the world’s favoured hot beverage with over 40% of the planet’s population consuming it daily, providing about 3.2 billion of us with a cup of delight to start (or finish) the day (1). Of course, this number pales when we add caffeinated tea, and currently 90% of us drink one or the other daily. For the mathematically inclined, that is about 5 million caffeine servings every minute of every day.