Answered by Chryso Kartsimadis on Monday, June 1, 2009
If you're a coffee drinker, you will never live a caffeine-free life, according to Manfred Kroger, Ph.D., professor of food science at Pennsylvania State University. "No chemical process is one hundred percent effective," says Kroger. "In the decaffeination process, ninety-eight percent of the caffeine is removed, leaving two percent." Since one average six-ounce cup of regular coffee contains 100 mg of caffeine, then one cup of decaffeinated coffee has 2 milligrams of caffeine. Not to worry. Kroger says that 2 milligrams is such a minuscule amount, your body will never notice it, unless you are hypersensitive to the stuff. The bottom line: You can sip a cup or two of Sanka before bed and still catch those Zzzs.