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Decaffeinated coffee is often less than 95% caffeine free, which is why doctors often advise caffeine-sensitive patients to avoid it in addition to regular coffee, though the vast majority of coffee drinkers would not be affected by it to a noticeable extent. A new study shows that that small amount of caffeine may be having a greater effect than previously thought. Not only could the small amount of caffeine - about .5 mg per ounce versus as much as 18mg per ounce in non-decaf - add up to a reasonably significant amount after several cups, but it could also trigger a caffeine dependency, just as regular coffee can. Who would have thought you could get hooked on decaf?
The study also noted that the caffeine content of different brands of coffee varied and, of the ones they tested (not all listed), only Folgers Instant was complete caffeine free.
