Came across this while on another one of my trips around the internet looking for something totally unrelated ... funny how that happens sometimes?
Anyway, thought I would "bookmark" it here with a little comment:
Daily Melatonin Administration at Middle Age Suppresses Male Rate Visceral Fat, Plasma Leptin, and Plasma Insulin to Youthful Levels
Yes, it is a rat study, but as the intro states, endogenous melatonin production decreases with age in both humans and rats. Basically regular melatonin supplementation reversed the increases in insulin and visceral fat associated with aging.
I don't know about any of you, but this middle aged (well I guess technically not yet, but ...) chick is going to look into this further!
In addition, if you scroll down the page, there's a list of articles that cite this study. I plan to check out a few of these.