Back in January there was a discussion here about Alton Brown having
lost 50 lbs in 6 months on a diet.   He was on a new Good Eats episode
last week that focused on the diet.   They were hinting at a new book
he's coming out with about it.   Maybe that explains why he looked so
terrible on Iron Chef at the white house.  He lost a drastic amount of
weight in a short time so he could write the book.  He looked a lot
better in the new video, maybe because he put back on some weight
after reaching the 50 lb benchmark.

I'm sure you can find info about the diet at FoodTV.   Some of the
basics were he eliminated almost all refined carbs and starchy
vegetables.  He did eat pasta and whole grain rice once a week.  He
also only ate red meat once a week, used healthy oils, and had oily
fish several times a week.  He did eat fruit freely.   At least that's
what I remember about it.   It was definitely a much reduced carb diet
compared to what the typical person eats.