A mouthful of dark chocolate each day could reduce blood pressure, cutting the risk of stroke, research suggests.
Forty-four people with raised blood pressure were put into two groups. One ate six grams of dark chocolate daily, the other the same amount of white.
The first group saw blood pressure fall slightly, but the others saw no change, researchers wrote in the Journal of American Medicine (JAMA).
The British Heart Foundation warned chocolate was a "treat not treatment".
Fat and sugar - The suggestion that cocoa has health benefits is not new, and previous research had also suggested it could bring down blood pressure.
This has been attributed to the chemical plant substances known as flavanols which it contains.