In a newly published study, a hormone that has been shown to make thin people feel full does the same thing for overweight people:
http://my.webmd.com/content/article/73/82024.htm
I'm concerned that even if this does work -- and they'll have to do lots more studies before it becomes publicly available, if it ever does -- hormone supplements alone will not teach people healthy lifestyle habits. Once the supplements stop, the weight is sure to creep back on. But other than that, I like to keep up on what's going on in the obesity field.
