'However, experts from Seoul National University of Medicine, who led the study, were unable to say whether depression leads to thinness or vice versa. '  Clueless reporters really don't know how to cover scientific studies. This was probably written by a fatty who read "skinny=bad" and got too excited about sharing it. What I read here is that out of a group of people with depression, some of them could be undereating. Not, "being skinny makes you depressed" like the grabby headline would imply and which I'm sure being over 300lbs would too.