a long look at the highs and lows of caffeine consumption:Reporter Emily Sohn takes
"As soon as you say coffee, people think caffeine; as soon as you say caffeine, people think coffee," says Terry Graham, a metabolic physiologist at the University of Guelph in Canada, a longtime caffeine researcher who recently organized an international symposium on caffeine and health. Scientists have isolated antioxidants, polyphenols, and micronutrients from coffee and tea, but there have been no long-term studies of how each ingredient, including caffeine, affects the body on its own or within a beverage.
"There are health benefits of coffee that have nothing to do with caffeine," Graham says. In fact, he adds: "There are no health benefits I've ever seen documented for caffeine."