This book’s scientifically proven advice remains true today: By understanding the “T-Factor” or thermogenic effect, in which carbohydrate calories are burned faster than fat calories, you can lose weight quickly and safely, and keep it off all without going hungry. Dr. Katahn explains how to choose foods that naturally maximize the T-factor level. He also includes exercises, recipes and meal plans. 2001. 5 1/2″ x 8 1/2″. 432 Pages.