I'm not entirely sure. Since the upgrade to Wombat 3.0 (2.0 being summer of last year when I shed two stone) and the added features of "no longer strains to poop" as well as "can run over one hundred yards without death" I'm becoming quite addicted to this health kick thing.
That and - ultimately most of the food you get served in this country is boring, tasteless, overpriced crap so I might as well eat boring, tasteless, cheap crap that has positive benefits. For example, all bran is about as interesting as a spar roll but a damned sight better for you. Also I can be assured that the person serving the all bran has washed my hands and not had them up any orifi/orifices recently. Thats roughly the theory anyway, I'm working on it.
Put it another way, now my body allows me to be 30% more egotistical and bombastic while processing about 40% more booze before sleep sets in. Its all about efficiency.