A national bestseller for more than three years in hardcover, The Zone has introduced millions of people worldwide to a breakthrough approach to dieting based on Novel Prize–winning scientific research. Treating food as the most powerful drug available, The Zone plan shows how food, when used unwisely, can be toxic. Used wisely however, it will take anyone into the Zone, a state of exceptional health familiar to champion athletes.

Now the benefits of Barry Sears?evolutionary program can be experienced in just one week! With A Week in the Zone, everyone can start on the path to permanent weight loss and learn how to burn body fat, and keep it off – without deprivation or hunger.

They'll also discover how the Zone helps to both increase energy and fight heart disease, diabetes, PMS, chronic fatigue, depression, and cancer.

More than 4 million people worldwide are already experiencing the health and performance benefits of the Zone -- the breakthrough scientific approach to dieting and wellness. Based on the hormonal consequences of food rather than the caloric content, the Zone treats food like a powerful drug that can help you maintain peak mental alertness, increase your energy, and reduce the likelihood of chronic disease -- all while losing excess body fat. In this essential, newly revised and updated reference guide, Dr. Barry Sears provides you with all the resources and Food Block information you need to achieve maximum success in the Zone, including: