Nutrition Diet: Crockpot Yumminess and Metabolic Foods The Nutrition Diet book covers two healthy diet plans featuring -Crockpot- Recipes and the Metabolism Diet. Both of these call for good diet foods in the healthy recipes. These two are good diets to go on if you wish to boost your metabolism and have healthy foods that are quick and easy to prepare (Crockpot recipes.) Good diet plans such as the ones featured in this book are great for making a good nutrition lifestyle.