Looking at a giant fat in another link, I had an epiphany; I know why the fats look older than they really are... It's something we've all noticed, fats look oler than they are. That might be because the have consumed enough calories that you would expect, for a person of the age that they look. Think about this for a minute: if you only need 1600 - 2500 Calories a day, then you would be expected to eat about 580,000 - 910,000 Calories per year. If you're eating between 3500 - 5000 Calories a day, that's about 1,280,000 - 1,825,000 per year. Maybe you only get so many calories to eat in a lifetime. A quick google search found a bunch of articles about life extension through caloric restriction; maybe there's something about processing calories that itself contributes to aging? What we've been seeing appears to be anecdotal evidence of just that, eating too much not only causes health problems, but also ages you faster.