I must be one of the luckiest people in the world!! I drink 2-5 cups of coffee a day (usually morning and evening combined) but when I didn't drink my regular cups, I got headaches, and couldn't concentrate. Any one else feel that way?? A friend introduced me to a new coffee called Gano. I drink only one cup of this in the morning (I can drink other brands the rest of the day, if I want to), but I don't have any more headaches and I have more energy and can concentrate better!! I LOVE THIS STUFF!!!