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 Home » Health » More Health News
Here's a jolt: Decaf coffee contains caffeine
If you drink 5-10 cups a day, it's the same as 1-2 cups regular, study
says
GAINESVILLE, Fla. - Does that cup of decaffeinated coffee give you a
jolt? It may, because almost all decaf coffee contains some caffeine,
a new University of Florida study shows.
The results could have implications for people told to avoid caffeine
because of certain medical conditions such as high blood pressure,
kidney disease or anxiety disorders, according to the study reported
in this month's Journal of Analytical Toxicology.
"If someone drinks five to 10 cups of decaffeinated coffee a day, the
dose of caffeine could easily reach the level in a cup or two of
caffeinated coffee," said co-author Dr. Bruce Goldberger, a professor
and director of the university's William R. Maples Center for Forensic
Medicine.
Researchers purchased 10 cups of 16-ounce drip-brewed coffee from nine
national chains and local coffee houses and tested them for caffeine
content.
Instant decaffeinated Folgers Coffee Crystals didn't have any
caffeine, but the others contained caffeine ranging from 8.6
milligrams to 13.9 milligrams. Typically, 16 ounces of drip-brewed
coffee contain about 170 milligrams of caffeine.
Researchers also analyzed 12 samples of Starbucks decaffeinated
espresso and brewed decaffeinated coffee. The espresso drinks had from
3 milligrams to 15.8 milligrams each, while the brewed coffee had from
12 to 13.4 milligrams per 16-ounce drink.
Even moderate caffeine levels can increase heart rate, blood pressure,
agitation and anxiety in some people, Goldberger said.
Dr. Roland Griffiths, a professor of behavioral biology and
neuroscience at Johns Hopkins School of Medicine, said caffeine as low
as 10 milligrams can cause behavioral effects in sensitive
individuals. Some popular espresso drinks, such as lattes, can deliver
as much caffeine as a can of Coca-Cola, about 31 milligrams.
"The important point is that decaffeinated coffee is not the same as
caffeine-free," Griffiths said.
Copyright 2006 The Associated Press. All rights reserved. This
material may not be published, broadcast, rewritten or redistributed.
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