Men with high levels of adiponectin, a protein produced by fat cells, have a decreased risk for heart attack, new research indicates. Further studies are needed to determine if this also applies to women. Animal research and cross-sectional studies have suggested that the risk of heart attack falls as adiponectin levels rise, lead author Dr. Tobias Pischon, from the Harvard School of Public Health in Boston, told Reuters Health. “But, ours is the first (forward-looking) study in a healthy population to look at this association.”