Why do some diets produce life-changing results for some people but not for others?

World-renowned health and fitness coach Dr. Joe Christiano updates his tested and proven weight-loss program based on the simple concept that your blood type—O, A, B, or AB—determines your body's ability to absorb nutrients, fight off disease, and lose weight.

Revised to include protocols for detoxification and address healthy colon function, this updated edition explains how a well-balanced eating plan based on blood type is pivotal for losing weight and keeping it off for life.