How many of us consumers ask for decaf simply because we don’t want to get too much and how many because it’s critical to our health (caffeine-sensitive, potential drug interactions, etc.)? Whatever the numbers, it turns out we’ve been getting fooled. And the reasons you don’t want caffeine in your coffee will determine just how concerned you feel about this.

Some of us may have thought this all along anyway. Get the details on comparative levels of caffeine in Folgers crystals, Dunkin’ Donuts and other specialty shops, and–last, but certainly not least culpable–Starbucks here.