I don't know if this really fits the bill, but I wrote a story where weight loss plays a major role. It's an SPN story though, set immediately after season 7. I would be exited if you gave it a look, it's all about Sam caring for Dean (and Cas) and feeding him to get him back on his feet again. But no hard feelings if this is not what you're looking for.Linky (http://skiing-pelican.livejournal.com/3889.html)