Stanford Scientists' Discovery of Hormone Offers Hope For Obesity Drug STANFORD, Calif. — When the appetite-enhancing hormone ghrelin was discovered a few years ago, researchers thought they had found the last of the major genes that regulate weight. They were wrong.Introducing: obestatin, a newly discovered hormone that suppresses appetite.The finding, published in the Nov. 11 issue of Science, offers a key to researchers developing treatments for obesity. In a nation that desperately needs to slim down—the U.S. Centers for Disease Control and Prevention estimates 65 percent of Americans over the age of 20 are either overweight or obese—obestatin is likely...