It feels like there is a simultaneous conversation happening atThanksgiving tables across the country. You eat a big meal — whichincludes a generous helping of turkey — and all of a sudden you’refeeling like you really want to lie down and take a nap. “It’s thetryptophan,” says Aunt Doris or Grandma Peggy or that cousin whoalways makes a big point of announcing that she’s watching herweight this year. Everyone nods in agreement, as if the tryptophanis a perfectly reasonable excuse. Unfortunately, the reality isthat you just ate way too much. It’s high