Caffeine, Friend or Foe?
One thing's for sure: Americans love their coffee. According to the National Coffee Association, we drink an average of 3.1 cups a day and spend a total of 40 billion dollars every year on it. We depend on our caffeine, for that boost in the morning or for an after-lunch second wind. What you might not know is that the buzz you feel after slamming a latte is not actually the caffeine. Adenosine, the circadian rhythm hormone that helps usher in sleep, starts as a slow trickle