In this photo taken Friday, Dec. 22, 2012, Carl Keen, who serves as chairman of the developmental nutrition program at the University of California, Davis, poses with cocoa powder in one of the schools research laboratories at the Davis, Calif. Keen, whose position is funded by the candy giant Mars Inc., said his laboratory's findings have pushed science forward through establishing that nutrients in cocoa powder can lower heart disease risk.(AP Photo/Rich Pedroncelli)