Magic Bullet for Weight Loss?

A recent study about a hormone (called PYY) that makes thin people feel full also works for overweight folks. They found that overweight people ate less after getting infusions of hormone PYY. So what does this mean? It means they need to do more studies, but experts are hopeful this will be another tool to fight obesity. I, for one, think exercise is a great tool to fight obesity--then again, I'm the Exercise Guide...I'm biased. Get the full story.