Lose That Extra Weight ... While Eating the Foods You Love!" Pleased to meat you. For decades, such headlines were fixtures of supermarket checkout lanes, to be taken no more seriously than claims of alien abduction. But times have changed. High-protein, low-carbohydrate diets have become wildly popular because they help adherents lose dozens of pounds without having to gnaw on rice cakes. It seems too good to be true, and some critics say it is. The debate over the long-term health effects of Atkins and similar weight-loss plans might grind on for years with no satisfactory conclusion. But whenever we're …