If caffeine is not the villain, what is?

New York - Decaffeinated coffee creates the same buzz as regular coffee, scientists believe. Researchers found increased heart rate, blood pressure and nervous system activity when occasional coffee drinkers drank a triple espresso, no matter whether it was normal or caffeine free.

Those who drank coffee regularly appeared to be protected against at least some of these effects, probably because they had grown to tolerate it. The report, published by Circulation: Journal of the American Heart Association, concludes that an unknown ingredient rather than caffeine is responsible for coffee's stimulant effects.

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