A study presented Wednesday at the American Heart Association's Scientific Sessions offers new evidence that caffeine in coffee may help improve the function of small blood vessels in healthy adults. Tests on blood flow to the index finger and thumb improved 30% on days the test subjects drank caffeinated coffee. "This gives us a clue about how coffee may help improve cardiovascular health," said researcher Dr. Masato Tsutsui, and "could lead to a new treatment strategy for cardiovascular disease."

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