Below is an intriguing BBC documentary, called "Why Are Thin People Not Fat?" In this film, ten thin people who have no history of obesity overeat whatever foods they want for several weeks and the results are evaluated at the end of the experiment. One especially interesting facet of the documentary is the fact that the Asian participant gains the least weight of all the participants and also appears to have the most elevated metabolism. Could it be that his genes are more pure -- i.e. less degeneration in his family -- than the others? Watch and decide for yourself!