In Turn Off the Fat Genes, Dr. Barnard explains nutrition’s impact on genes and provides a three-week program with more than 100 recipes specifically designed to influence the five key genes that determine: (1) which foods you prefer, (2) the strength of your appetite, (3) whether your calories are burned or stored as fat, (4) how fast you burn calories, and (5) your muscular type and ability to exercise. 350 pages.