Caffeine - A Dangerous Drug The most commonly used drug in North America is caffeine. Eighty per cent of North Americans consume it daily. Coffee drinkers usually start out with one or two cups a day, but over time it isn’t unusual for the habit to increase to between five and 10 or more cups daily.
The Right Nutrients Can Reduce Cravings Margo, a thirty-five-year-old stewardess, came into my office. She’d been more tired and less able to adapt to time-zone changes than in the past.