People Metabolize Caffeine Differently

There are those that can guzzle a double shot of espresso and fall asleep within the hour. For others, a single cup of regular coffee might keep them awake for half the night. Depending on your body chemistry, usual coffee habits, or even your genes, you may be a fast metabolizer of caffeine or a slow metabolizer. For unusually caffeine-sensitive people, decaf is a better choice. Caffeine levels of coffee beans vary from farm to farm, tree to tree and roast to roast. A typical 8-ounce cup of coffee has approximately 95 milligrams (mg) of caffeine but this can vary anywhere from 75mg to 165mg. Decaf coffee normally contains 2mg or less per cup. It is not totally caffeine-free but this amount is generally not troublesome. 

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