Photo Caption: What is the truth about the health impacts of coffee? (Dreamstime)Is coffee good or bad for us? How much is too much? Can it stunt growth? Donald Hensrud, M.D., director of Mayo Clinic’s Healthy Living Program, provides answers to these much-debated questions. The greatest of all holidays _ International Coffee Day _ was celebrated by all (we assume) on Sept. 29. If you’re like us, though, you don’t need a designated day to celebrate the joys of coffee because every day is Coffee Day.