I was sipping on a giant mug of warm, delicious coffee as I read this recent story about Johns Hopkins research on caffeine addiction. And then I felt kind of guilty. And then I poured myself another cup.
But at least I’m not alone; according to researchers, “caffeine is the most commonly used drug in the world,” consumed by 90 percent (!) of U.S. adults on a regular basis. Which is okay… up to a point.