Otolaryngologists and ENT physicians are the same. ENT=Ears, Nose, and Throat - Oto=ear, laryng=throat (the nose, or rhino, was dropped some years ago). Otolaryngologists go through 1 year of general surgery training and an additional 4-5 years of specialty head and neck surgery.
But many popular brands actually contain considerably less than an old-fashioned cup of black coffee. An 8.4-ounce serving of Red Bull, for instance, has a relatively modest 76 to 80 mg of caffeine, compared to the 95 to 200 mg in a typical cup of coffee, the Mayo Clinic reports.
To put this in perspective, a typical cup of regular coffee contains, on average, 150 mg of caffeine. Some roasted coffees contain as much as 400 mg of caffeine per cup. So, the amount of caffeine in Perfect Green Coffee should not affect most people unless they are very sensitive to minimal amounts of caffeine.