(WineSpectator) - A team of Dutch scientists has found that resveratrol, the polyphenolic compound that has attracted a great deal of interest in the scientific community in recent years, can improve the metabolism of overweight men, improving their health and possibly extending their lives. Resveratrol's image has experienced some ups and downs lately. One recent study raised serious doubts about earlier claims that resveratrol could potentially increase lifespans in animals. Another study said that resveratrol studies on animals could not be replicated in human trials